I disagree with that last assessment, streaming involves significant investments (time, gear, knowledge) with little chance of paying off given the crowded playing field. The current successful streamers built their audience over several years, and while they are currently living well off of their activity, I'm not sure any "got rich fast".

Crypto-currency main purpose is get rich fast given the volatility of the market. Streaming isn't given the required time investment. Being known from other stuff before streaming is also a plus, but not a guarantee of success.