I am not sure about the millionaire status. But you can make a good amount of money depending on how intelligently and how dedicatedly you trade or invest in crypto. I have heard that people have gained a lot with the rise of Bitcoin because they invested in it at the right time. So, you need great timing, learning, and strategy to gain profits in cryptocurrency. Maybe one day, the millionaire status will come true for every crypto investor.
Timing and capital help a lot, plus applying a good strategy to grow your investment/trades completely make you more profitable than normal people here. But, we haven't thought that was very easy. No, you can't, especially if you are too emotional and have no deep knowledge about the market.
Rich people can do possibly make more money here. They have a lot of money in the first place and they can afford to put millions as capital for the investment which we could surely think that it gains millions as well.