In many cases who have funds, many users get afraid in Bear market and they rush to buy in Bull market because of FOMO and that's the main reason why many of us aren't holding. They think that bear market will remain for long period and they don't want to stuck their assets for an uncertain future. But they don't actually believe about the potential of Bitcoin. At the bull season they just arrive like a Bitcoin lover and start holding for more profits.
We have to know the meaning of this phrase "Hodl is Gold". Holders from the bottom always win and FOMO holders just regret in many cases.