The mistake that i hear over and over again on this forum is that investors commiserate that their position sizing has been too small on their trades. One story that I heard about was an investor that put in $200 into Bitcoin back when it was at $60 and bought only 3 coins. If that bet had been $3000 it could have been life changing money. I had the same problem with NEO, predicted correctly that it would go up and bought it, but did so with a smallish position size. We all make mistakes and its great if we can learn from them.