I don't miss bitcoin because I just want to leave for a while and if the price is back to normal then we will also return to the crypto world, because this investment is long term so we are free to go and come back whenever we want, maybe because of this bitcoin very much loved by its users with the freedom of thought they give miners
Some people already made a profit and they wanted to rest for a while and do things they really want to do without stressing themselves with the crypto market every day. Most likely people that are missing the bullish trend right now didn't actually expect that it will gonna happened this month. Therefore, they just right there waiting for the right time to make an entry to the market to also get some profit while it's still hot and moving its price up.
Well the OP was rather referring to the scenario where people miss out on Bitcoin fully. There are many possibilities that have been discussed all over I would say. Asking the people here doesn't make so much sense because what do you even mean by "miss"? Did someone miss Bitcoin when he found out in 2017? Or 2018? I don't think so. The very early guys were at least tech gurus, but for sure IT guys and cryptographers or programmers.