What's the crypto buy (or sell) you still think about?

Building CryptoFumble (launching this Friday!) — a calculator that shows exactly what your money would be worth today if you'd bought any coin, any amount, on any date.

Curious what's on people's minds while I finish polishing this: what's the crypto decision you still think about? Doesn't have to be a regret — "sold way too early" stories count too, those hurt just as much.

Drop yours below and I'll run a few of the wilder ones through the calculator and post the actual receipts here before launch 👀