We have some of the most intelligent people in the world working on extracting as much wealth as possible from high volume trading. For someone to gain money in the market someone most lose. Imagine if we had these minds working on solving real world problems that would actually benefit society. Just like gambling, trading is zero sum.
This is a normal phenomenon, and only a high return can attract investors to join in. Nowadays, cryptocurrencies are very volatile every day, which is very suitable for short-term trading.