I would tell you that the cryptocurrency market is not so profitable as we all think. The principle is that you need to have time to go into it and get out on time.
It's not very profitable right now because we are in a bear market. It's hard to make money in a bear market, but it's really easy to make money in a bull market. The only market that could be destroyed is the crappy small scam altcoin market. I don't think those will ever recover, and only the main big altcoins will survive. Only time will tell.
The best way to make money in a bear market is to buy as much coin as possible and hodl.