In this guide, you will learn all about Bitcoin (BTC) and cryptocurrency, how they work, why they exist and what kind of technology is behind Bitcoin. It wasn't too long ago when people started hearing the words 'Bitcoin' and 'cryptocurrencies.' Few people outside of the crypto-communities knew what they were and many thought it was just another fad that was bound to fail in a few years or so. The value of one bitcoin was just a few cents then so obviously it wasn't worth a lot. For this reason, it was ignored by the masses. There were far more profitable investments one could make, after all. Those who invested sums of money on the new digital currency either believed in the system proposed by its founder, Satoshi Nakamoto, or they simply wanted to see how it works.