Well buying a load of Bitcoin had crossed my mind a lot in a question like this in the past and I don't blame you carrying back such life altering knowledge assuming the past is fluid, dynamic and not fixed. Temporal mechanics state that time is not always linear and can lead to unintended consequences. I collected mostly Dogecoin since it was easier and I was surprised it paid off.
One past regret I'd like to do is say to my long late father, "I love you, and a long goodbye."

!LADY