There are a lot of them. My own experience is when I should've sold my shitcoins when it was gaining more than 30% in one day but I waited for it to spike more but then it dropped. And then another one is when I think that altcoins that are priced 1 satoshi is easy to make money but I always get stuck in the hype and I bought it in 2-4 sats but I never did check its total supply.