My major fear is of course FOMO. I'm more or less used to pump and dumps, and probably would feel ok if assets that I bought will lose in price. But I fear the most, that I will miss the chance to sell, while assets still worth something. For example if I have bought bitcoin at the price of $50k, during dump, I would feel ok if I could sell it for $20k. But it will be a disaster, if at the moment I login to exchange, its price will be 1 cent only.