That's exactly how I feel. But is there a way to actually cash out? I mean, suppose you had 2 BTC for years. Can you literally get $100K right now in your bank account and can you actually exchange them easily for the fiat currency?
Easily cash out yes, but would have you kept track of that BTC for years is another question. There were plenty of gotchas along the way with BTC before it went completely mainstream. Buggy hardware wallets, scams, exchanges going bankrupt/stealing btc, people's hard drives dying, etc... mean for anyone to have held from $1 to $50k they were prescient and a bit lucky.
Yes, this is very easy to do exactly in the way you describe.
Oh well, in that case I do feel a tinge of regret. :(
Yes, you could easily do this for 10s of millions of dollar right now on a number of exchanges. As you go up, you might need to find OTC desks, etc, but it's still very doable.