Life is full of mistakes. Some of the things you have mentioned have happened to most people whom I think was not giving too much importance to bitcoin except for some cases where accidentally they lost their private keys. But for some of those who did not value bitcoin in the beginning are those who end up looking for bitcoin private keys because to them bitcoin was just something that doesn't give them ample returns until one day when the value did rise up high they keep looking for it like crazy.
There is one thing which I believe in and that is no one in this world is perfect and that we all make some mistakes at certain level and that because of which we may suffer a lot as well. However, you can only be successful in your life if you learn some good lessons from the mistakes which you made instead of repeating those mistakes again in your lives. Stay positive and think well before you make any kind of decision.