Well yes I really agree on this matter that we must not regret anything that we have experienced regarding altcoin or to any crypto currencies out there because all those thing that we have experienced will become part of our knowledge and in turn will help us avoid similar failures in the future that will make us regret.
Today I just thought about it when I sold coins, and then they grew by 10%. If I waited a few minutes, everything would be much more profitable for me. And this is not the first lesson for me. I cant learn to trade with patience. Advice to not regret is for me. And more exposure.