You simply can't get hung up on what could have been. Same applies to trying to time the stock market... should have bought, should have sold. Best thing is to know there's nothing that can be done about the past and move along and deal with what you can do now instead.
You're right. What gets me though is that unlike the stock market, bitcoin was an incredibly rare occurrence where anyone could have gotten extraordinarily rich without even incurring any risk! (besides a couple evenings spent learning how to use it.) Whereas to have $10MM today in GOOG stock, I would have had to invest over $300k in 2010.