From my own experience, I started on demo platform, after I made a lot of good trades, I opened futures account on Binance. I made couple of good trades, some bad, but still in profit. Then I had a terrific idea to increase leverage from 10x to 25x. And that was it for me. Then the bad trade came and instead of setting stop loss, I kept my position open increasing exposure to survive, because all the technical indicators were screaming market will turn my way. It did not. And I lost everything.
Now I am back, with less money, with 10x leverage, I will keep reading books about trading and hope for the best.