Everything that has happened is in the past, there is no need to regret what happened in the past, just think of it as a beautiful journey since you got involved in Bitcoin. If a squirrel knows it's going to fall, it won't jump. Likewise with all the TX that you have done in the past, if you knew Bitcoin would be this popular and traded at a higher price, of course you would have kept all the Bitcoin you held at that time. I will be realistic about what I have done in the past, I also do not consider this incident as a mistake because every TX that happened at that time I did without any pressure.
The past is something we cannot change, but where the future will go is up to us to decide, so reminiscing about the past and feeling regretful is just a meaningless waste of time. The transactions of OP or anyone in the past are nothing compared to trading 10kBTC just in exchange for 2 pizzas but Laszlo Hanyecz has never felt regretful about that. So why do we always feel regretful about the past?
It's difficult to understand that many people always look back on the past and have regrets while the future is still waiting for us with better things. Honestly, I really hate people who like to talk about the past and always make "what if" hypotheses. If everyone knew the future, would this still be called life?