Basic Concepts

ELI5 What is a Merkle Root? by @Cryptobill
If you've been around cryptocurrencies for a while then you've probably heard the term Merkle root thrown around in technical discussions.  Welcome to our ELI5 article on merkle r...
ELI5 PSBT – Partially Signed Bitcoin Transactions by @Cryptobill
One of the key concepts behind cryptocurrencies is that you should not be obligated to know or trust your peers. Therefore every development in Bitcoin Core must have a decentraliz...
ELI5 What is Bitmessage? by @Cryptobill
Bitmessage is a messaging protocol designed by Jonathan Warren in 2012. The purpose of Bitmessage is to allow parties to communicate with each other in a secure and 100% decentr...
ELI5: What is a full node? by @Cryptobill
A full node is a network connected computer that runs the official cryptocurrency client and has a complete and synchronized copy of the blockchain. When Bitcoin first appeared,...
Why are there so many cryptocurrency exchanges? by @Cryptobill
You may have noticed the suffix "EX" appears a lot while studying or working with cryptocurrencies? "EX" is short for EXchange and there are literally tens of them, perhaps over...
ELI5: Cryptocurrency master keys by @Cryptobill
A cryptocurrency master key is a theoretical concept where one specially crafted cryptographic private key would be able to decrypt ciphertext encrypted using any public key. As...
ELI5 Crypto cap by @Cryptobill
"Crypto cap" may refer to different things, depending on context. Unless it's a stylish wearable hat with a reference to cryptocurrencies on it, then crypto cap probably refers ...
Can I buy Bitcoin at Walmart? by @Cryptobill
It's not possible to buy Bitcoin at Walmart directly but there are indirect methods that you can use. Some sellers do not accept cash, Visa or Mastercard (!) on their Bitcoin sa...
ELI5 Is Coinbase safe? by @Cryptobill
There's an old saying by cryptocurrency experts that goes a little like this: "if you don't control your private key, then you don't really own cryptocurrency." This is technica...
ELI5 How many Bitcoins are there? Is the number of Bitcoins limited? by @Cryptobill
tl;dr; There are 17.4 million Bitcoins in circulation at the time of this writing. Bitcoin supply is limited at 21 million BTC. This limit will be reached in the far future as bloc...