Everyone is talking about blockchain and cryptocurrencies. When Bitcoin appeared twelve years ago, no one could have dreamt of the impact it would make. Today, there are countless different cryptocurrencies on the market, and some of them are quite popular like Ethereum. There is no denying that altcoins are exciting, but the most exciting thing about cryptocurrencies is the technology behind them – blockchain. Blockchain is a continuously growing list of records and data, chained together us...