A mental exercise I do to manage FOMO is to try and remember duds that I pondered might be the next BTC. Admittedly, it's hard because the brain really tries to forget about those. Keeping a diary is probably the key here.
And then you get the ones like Dogecoin that were supposed to be a dud, and it's still around more than 5 years later and just had a massive spike today until RH decided to restrict the use of instant deposits to buy it.
Can't have the poors making money!