Everyone has his/her approach towards Cryptocurrency and not all who are involved in it fully understand it not to talk about those who don't know about it entirely
Those people who does not know about cryptocurrency and who does not want to take risk they cant invest on crypto. Up-down of crypto is too much which many people cant take risk so they stay away from crypto.
Without knowledge of crypto then no investment, that's always a good reason why people don't invest in crypto because if we don't know what we're doing, we also fail when we join, especially a dangerous crypto market, the price for failure is always too great. In addition, information about scams, crypto is ponzi and lots of negative comments, the government has also warned people about crypto, so even if crypto is profitable, many people still dare not participate in it, the image is too bad and unreliable