Nice post, keep the good work. Perhaps it is convenient to mention also the "Arbitrage" aspect of trading cryptocurrencies, since there are a lot of exchanges where one can buy/sell them. In simple terms that would be when the price of one, for example bitcoin, differs between two places or exchanges where is traded, so, for example, one can buy a bitcoin in a exchange where is the lowest price and then immediately sell it on the exchange where the prices is the highest price.