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Bitcoin the Crypto King – An Overview

January 2, 2021 By cryptoxray Leave a Comment

Bitcoin the Crypto King

Bitcoin was launched in 2008 by an anonymous person or group called Satoshi Nakamoto.

It was the first cryptocurrency to become popular on the internet, and for that reason, Bitcoin is often referred to as the King of Cryptocurrencies or the original cryptocurrency.

There is a maximum supply of 21 million bitcoin, which will never be increased, however each bitcoin may be split into 100 million Satoshis.

On 22nd May 2010, a man called Laszlo Hanyecz agreed to pay 10,000 bitcoin, worth a total of $41 at the time, for two pizzas. Currently in 2021, that same 10,000 bitcoin would be worth a staggering $298.2 million!

What is a Bitcoin?

Bitcoin, as all other cryptocurrencies do not exist as objects, the bitcoin network is simply a shared public ledger.

These ledgers record all the transactions ever made within the blockchain network, and are verified throughout the network nodes to form a consensus. Cryptography is employed to secure the network, which follow strict rules, and prevents previous blocks from being modified.

The blocks form a chain hence ‘blockchain’, and each block refers to the previous block via a cryptographic hash. If a previous hash is altered, it would corrupt the whole chain and flag an error in the consensus.

The Bitcoin Network

To maintain the Bitcoin network, it is necessary for computers (nodes), to process the transactions. These nodes are rewarded in bitcoin for their work and are known as miners. Miners have to use electricity for their computing devices or nodes, which can be very expensive. 

This is why many mining pools are located in areas of the world where the cost of electricity is cheap.

Due to the expensive costs of acquiring mining hardware and paying electricity bills, bitcoin miners have come together to form mining pools.

Most of these mining pools are currently located in China, Czech Republic, Iceland, Japan, Georgia and Russia. However, at the time of writing there are some miners moving from China to countries like Norway, Sweden and the US, due to the cheaper electricity prices. 

Bitcoin mining pool distribution
Bitcoin Mining Pool Distribution 2020

What is proof of work?

Bitcoin employs a proof of work system (POW) called HashCash. The bitcoin miners run some computer code, which pools together unconfirmed transactions and combined with other data forms a block, resulting in a reward.

However, the block can only be accepted if it meets certain criteria, which takes some additional computational processing. The block is accepted when a miner discovers by trial and error something called a Nonce number – number only used once.

The Nonce is used to set a difficulty level on the network, and requires a block hash to be preceded by a certain quantity of leading zeros. The difficulty level is periodically adjusted in the bitcoin network to maintain an average creation of six blocks per hour.

At the beginning of 2020, the hash difficulty requirement was hardened, as a response to faster hashing mining equipment. The new requirement was for the first 74 of 256 hash bits to be zero.

There have been many concerns over the amount of energy the bitcoin network consumes, however as global energy suppliers shift to cleaner alternatives, like wind and solar, then these concerns should become less of a concern.

You can view the original Bitcoin White Paper here

How to buy Bitcoin

Head over to our guide here

Filed Under: Bitcoin, Crypto Guides

How to Send or Receive ERC-20 Tokens with Ledger Nano

December 12, 2020 By cryptoxray Leave a Comment

How To Send Or Receive ERC20 Tokens With Ledger Nano

Is the Token ERC-20?

First establish if the token is ERC-20 or not by visiting Coingecko.com or Coinmarketcap.com.

Token Information on Coingecko

If you search for the token on Coingecko.com, you will see information for Market Cap, Explorers, Contract, Community, Source Code, Tags etc. If the Explorer is Etherscan, then the token is most likely ERC-20 – click on the Etherscan link, which should take you to the token information on Etherscan. Here on the token page, you should ERC-20 next to Overview.

For this example we used a token called API3

Etherscan is the leading blockchain explorer for the Ethereum network.

How to receive ERC20 Tokens on Ledger Nano

Having established that the token is ERC-20, you can send all ERC-20 tokens to your Ethereum address. To find out your Ethereum address on your Ledger Nano device

Activate your Ledger Nano and open the Ethereum app

Open up the Ledger Live app on your phone or computer, enter your password > Transfer > Receive > Ethereum > 

Select your Ledger Nano device in Ledger Live

Verify the address on the Ledger Nano device > approve

On Ledger Live > share or copy the address – this is the address to send your ERC-20 tokens to.

Why can’t I see my tokens?

Unless the token is well established, once you have sent your ERC-20 token to your Ethereum address, you probably won’t see them in Ledger Live.

To see your ERC-20 tokens at your Ethereum address, you can head over to etherscan.io and create a free account. Once your account is set up, you can create a watch list – just simply enter your Ethereum address to view your tokens.

How can I send my ERC20 Tokens to another address?

Some high market cap ERC20 tokens are supported by Ledger, so you can send them directly from Ledger Live. Here is a link to the Ledger supported crypto assets https://www.ledger.com/supported-crypto-assets.

Follow these instructions if your token is not on the list of supported Ledger Tokens.

If you want to send the ERC-20 tokens from your Ledger device Ethereum wallet to another address ie exchange etc, you will need to head over to www.myetherwallet.com > Access My Wallet > Hardware > Ledger > Select the Ledger device from the drop menu. 

If your ERC20 token is not supported by Ledger, then connect and open your Ledger device > open the Ethereum app

In MEW (myetherwallet), select the address to interact with – it’s probably the first option showing a balance > Accept the terms > Access my wallet

Here you will have to add your new token details under “Custom tokens” > Add custom tokens

MEW – Add Custom Tokens
MEW Add Custom Tokens

How to add a custom token to MEW

You will need three pieces of information to add a custom token in MEW, which you can find at https://ethplorer.io/

The safest way to find your token here is to copy and paste the contract address from Coingecko.com or Coinmarketcap.com into the search field.

The three pieces of information you will need to add a custom token on MEW are:

Token contract address:

Token symbol:

Decimals:

Enter the details > Save

You should see the balance of your tokens on the right side of the MEW screen.

To send a transaction > Send > Select token from drop menu > Enter the recipients address >

Select amount or Entire balance > Send transaction

Approve on the Ledger Nano device

If the “Send Transaction” button is greyed out and is not active. Go to the Ethereum app on Ledger device > Settings > Settings contract data. Allow contract data in transactions – this usually fixes this issue.

You can purchase a ledger device from our link here

Filed Under: Crypto Guides

Can Crypto Private Keys Be Guessed?

November 26, 2020 By cryptoxray Leave a Comment

Crypto Private Key

Can Crypto Private Keys Be Guessed?

Cryptocurrencies utilise two keys, a private key and public key.

The wallet address is derived from the public key.

A private key is used to verify that a public address belongs to the user, and should be either stored securely or accessed via a hard wallet ie Ledger Nano

In bitcoin and many other cryptocurrencies, the private key is a 256-bit number, however in most cases this number is represented in the form of a 64 digit hexadecimal number for simplicity. 256 bytes in hexadecimal is 32 bytes or 64 characters in the range 0 to F ie 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10 etc

A private key is a long number formed from 256 bits. 

In computers, bits are digital switches and have two states – either on/off or 1 or 0, so each bit has a total of two values.

So how easy is it to guess a private key?

2 to the power of 256, written as 2256, can be calculated by multiplying 2 by 2 by 2 etc 256 times ie 2x2x2x2x2x2x2xx2 etc 256 times

Half of 2256 = 2255, not as many people would guess to be 2128

2256 = 1077 approximately.

That’s 10 to the power of 77 – or 10 x 10 x 10 x 10 etc 77 times

Just how big is this number?

To give you an idea of how big 2256 or 1077 is – scientists estimate there to be approximately between 1078and 1082 atoms in the observable universe!

Therefore, the chance of guessing somebody’s private key are practically impossible even with the most advanced computers on earth today.

Filed Under: Crypto Guides

How To Find Crypto Gems

November 11, 2020 By cryptoxray Leave a Comment

How To Find Crypto Gems

There are many YouTubers and crypto gurus on the internet extolling their favourite tokens, but how do we know if these tokens are worth buying or are they just being shilled?

Here we have put together some pointers to help you filter out the gems from the average and scam tokens.

DYOR – Do your own research

Our first step is to search for the token on CoinGecko.com or CoinMarketCap.com.

From here we can find the company website and the white paper.

The white paper gives a summary of the project and explains concisely solutions to existing problems.

From the website, we can determine if the project is finished and if it already has customers. Obviously, the risk will be higher for unfinished projects with no current customers, so bear this in mind.

White paper

Take a good look at the white paper and ask yourself if it has been quickly put together in a few days, or is it a detailed piece of work requiring an educated project management team?

Look at the team behind the project.

Project team

If the team is not listed on the website, go to Linked-In and search for the project. Look at the management team. Have they worked at well-known companies? If so, how long?

Do they have a good educational background in the area of their vocation?

Does the project have good backing from established investors?

Github

Go to Github – is the project listed? Is it open source? If not, that’s a warning sign.

How many people are following the project on Github? – Look at the number of stars and forks.

When was the code last updated? If not recently, it could be an alarm bell.

Have files been updated etc with value code? Who updated the files – marketers or coders.

How is the community – look at Twitter – how many followers?

Look at Facebook – how many followers.

Is the market liquid?

Liquidity is important in trading because it helps to keep the asset price stable. We don’t want to invest in a project with an unstable price.

To find the liquidity of a project, take the daily trading volume and divide it by the market cap. 

Tokens with a volume/market cap ratio of less than 10% means the token is not very liquid and is probably not a good idea to invest in. A good ratio is between 10% and 50%

Examples of liquidity based on prices: 

Theta Market Cap = $626,605,451

Trading Volume = $20,203,934

Volume/Market Cap 0.0322 – in this case the liquidity is less than 10% 

Chainlink Market Cap = $5,096,209,048

Trading Volume = $980,121,958

Volume/Market Cap = 0.1989 – in this case the liquidity is greater than 10% ie 0.1 = 10%

Artificial Intelligence

For those of us who are pushed for time to do research, there is a useful website called TokenMetrics, which uses artificial intelligence to predict future cryptocurrency price moves.

The website is the creation of Ian Balina, who is well-known in the crypto space for his expertise in finding value investments.

The website is not free, but comes with a money back guarantee if you are not completely satisfied with the performance.

You can watch a promotional video here

Filed Under: Crypto Guides

Beginners Guide to Buying & Storing Cryptocurrency

November 5, 2020 By cryptoxray Leave a Comment

Beginners Guide to Buying & Storing Cryptocurrency

Cryptocurrency is gaining popularity in the modern world that we now find ourselves living in. At the time of writing the cryptocurrency market cap is around $403 billion dollars – that’s 403 followed by 9 zeros! 

Unfortunately, there are many criminals and scammers who operate in the crypto space, and that makes many people, particularly newbies, extremely vulnerable to this form of investment. 

To address this vulnerability, here is our guide for newbies entering the crypto space

Crypto Security

First of all, invest in a hard wallet such as a Ledger Nano X or Trezor.

Ledger Nano X - The secure hardware wallet

What is a Hard Wallet?

A hard wallet is a small device similar to a USB memory stick that you keep yourself – think of a hard wallet as your personal crypto bank.

Acquiring Cryptocurrencies

To purchase cryptocurrencies, you will need to acquire them through a cryptocurrency exchange, such as Binance.com or Coinbase.com. Once you have acquired your crypto assets, you can either leave them on the exchange or move them somewhere else. We recommend that you move your tokens to your hard wallet. Exchanges are vulnerable to hackers, may be closed down by authorities investigating anomalies, and are generally deemed unsafe places to leave your assets.

Ledger Nano X - The secure hardware wallet

Crypto Exchanges

In 2014, an exchange called MtGox suspended trading, closed its website, and filed for bankruptcy protection against creditors. Just prior to that time MtGox was the biggest bitcoin exchange in the world and processed up to 70% of all bitcoin transactions. Even the largest crypto exchanges may prevent withdrawals at very short notice.

Since the suspension of MtGox, creditors have not received any of their deposits, and the legal case is still ongoing in 2020. At best, MtGox creditors may receive 25% of their digital assets once the legal process has reached completion, which could by anytime depending on the Japanese legal system.

At the time of writing in 2020, an exchange based in Hong Kong and Malta called OKEx has suspended all withdrawals. This was due to one of the private key holders being investigated by Chinese authorities.

More and more crypto exchanges are appearing every year and so far in 2020, no less than 75 crypto exchanges have shut down.

The point here is that the safest place for your digital assets is a hardware wallet, where you store the keys safely offline. Nobody can shut down your hardware wallet – it’s your personal crypto bank, so invest in one.

One of the most common mistakes newbies make

Many newbies enter the cryptocurrency space by buying bitcoin and then moving to Ethereum and then altcoins. As the hunger for knowledge of digital assets grows, newbies will find some Youtuber or crypto guru who extols the virtue of some unheard-of token or project. Many of these projects will amount to nothing, the price will sink to zero, and these newbies will lose all the money they invested in them. That’s just how it is.

An alternative route into crypto is to simply buy bitcoin or Ethereum at regular time intervals and keep it in your hard wallet.

There is a great website https://www.bitcoindollarcostaverage.com , which illustrates the outcomes of averaging-into bitcoin in your chosen time frame and amount.

Crypto journey

Most newbie investors coming into crypto drift from Bitcoin to Ethereum to altcoins because the rewards can be significantly greater. We’ve all heard Youtubers boast of their 10x, 20x, 100x, or even greater token recommendations. They don’t tell you about all the bad recommendations they’ve given. Alt coin speculating can be rewarding if you buy the right tokens at the right time, but it can be painful if you get it wrong.

What are altcoins?

Most altcoins run on the Ethereum network and meet a standard called ERC20, which is a technical standard that all tokens must meet in order to run on the Ethereum network.

If you have an Ethereum wallet, you can simply send your ERC20 tokens to your Ethereum wallet address and store them there.

How to determine if a token is ERC20

  • Search for the token on Coingecko.com or Coinmarketcap.com
  • On the token’s page, you will find a contract address under the tokens name with a small icon to copy the address. 
  • Copy the address. If there is no contract address the token is probably not ERC20
  • Paste the contract address into the search field at https://etherscan.io/
  • Verify that the contract address on https://etherscan.io/ is listed as the token
  • If the token is listed on Etherscan as your token, then it is ERC20

A significant amount of the people who have made good profits in cryptocurrency are simply HODlers. These are investors who accumulate bitcoin or Ethereum and store it as a long term investment. HODL – means ‘Hold on for dear life’, and is a term often used in crypto.

Altcoins may be good investments during alt coin seasons, which usually take place when Bitcoin(BTC) loses its dominance. You can check Bitcoin’s dominance here – if the trend is down, it maybe a good time to enter the altcoin market. However, altcoins should be treated as higher risk / higher reward assets and you should not go all in on one token. Only risk what you are prepared to totally lose on altcoins – view them as wild cards.

Altcoin research

One more thing with regards to altcoins is to do your own research (DYOR)

Do not just take a Youtuber or other tipsters advice blindly.

You can research a project by first going to coingecko.com or CoinMarketCap.com and searching for the altcoin. Once you have found the altcoin, you can visit the project website or view a basic chart. This will give you an overview of the project. From there, you can drill down into specifics and try and see the project from a user’s perspective.

Which Wallet to store your ERC20 Tokens?

Check out our guides here How to Send or Receive ERC-20 Tokens with Ledger Nano and Beginners Guide to Buying & Storing Cryptocurrency

Filed Under: Crypto Guides

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