If am asked, I did say that there's no way to avoid "had I known" 100 percent, but it's chances of occurring can be reduced to the barest minimum of some precautions are strictly followed.
For example, you try and research very well before investing your hard earned money on any project, make sure the coin or token has a very strong use case, because some projects come up with some lame use case just to get investor's money and at the end of the day, the project might be alive but their coin or token will be dead cus of lack of strong use case for the coin or token.
Another example is not to listen or pay attention to fud, set a realistic target for yourself and don't get greedy, if you've researched the project very well and you trust where you put your money, then hold it tight and never sell until it hits your target, and ones it hits your target, don't get too greedy, sell and wait for the deep to buy in again or move on to another quality project.