Not buying any coins in Jun 2011 was my worst decision.

Because that was around the time I first heard about the concept of Bitcoin.

BTC was what? $15-30 back then? That is still an enormous bargain compared to now...

EDIT: I once heard that most of the people who became rich off BTC weren't the early adopters but the ones who bought in 2011. Many early adopters either lost their coins or sold them too early.