My biggest crypto regret ever is that I didn't buy Bitcoin when it's still affordable. And also selling those tokens and coins with a good foundation and use cases at very cheap price while strongly hodling shit tokens. I could have been a millionaire by now if I just made the right choice.
Everyone had their own mistakes. In order not to regret anything, you do not need to crave easy money, but carefully prepare, learn the basics of trading. Those who rushed into all the projects in a row were left with nothing. In the cryptocurrency market, either real lucky people or experienced financiers remained in the black. The rest just participate out of excitement or curiosity.