Because majority of them don't have enough knowledge about crytocurrency. They are scared that it's only a digital money and you have no physical money holding like those fiat money. But if they learned what crypto is and how great it is, for sure they will prefer to use this as their future mode of payment.
And also they do not know what it's like to profit from crypto.
Hey guys, why do you think people dont believe in crypto? The potential of crypto is great. Moreover crypto is the currency of the future! Do you agree?
People around me in the social media sphere. Many do not understand about crypto. and also because a lot of scams on behalf of Bitcoin, So many people do not care about crypto.