SAN SALVADOR, El Salvador (AP) — El Salvador President Nayib Bukele announced in a recorded message played at a Bitcoin conference in Miami that next week he will send proposed legislation to the country's congress that would make the cryptocurrency legal tender in the Central American nation.
Mining computers compile valid transactions into a new block and attempt to generate the cryptographic link to the previous block by finding a solution to a complex algorithm. When a computer succeeds in generating the link, it adds the block to its version of the blockchain file and broadcasts the update across the network.

Nelson primarily invests in low cost index funds because “I can see history on that,” she says. The newness of cryptocurrency and lack of trackable data make her wary of these crazy swings.
Cryptocurrency transactions are recorded on a decentralized ledger. This ledger is called a blockchain. Every time crypto is bought or sold, the transaction is added to the blockchain — a public database of the transactions, which is available to other crypto holders. Anyone can join and participate in the blockchain, but data on individual transactions — and the people involved with them — are secured using cryptography (the basis for the term cryptocurrency). For each transaction added to the blockchain, there’s a digital validation process to verify it and prevent fraud.