and some of the people there dislike the idea of bitcoin and crypto. So, I was wondering why, but didn't bother to ask them since it's their own preference, and so it cross into my mind that "What does BTCitcoin needed in order to become a mainstream payment system? "
You see some of the people you met on you social media platform that disliked the idea of bitcoin and crypto will be influenced to have a change of opinion when everybody around them, people that they have close relationship with begin to accept and use bitcoins. Many of them will have a change of opinion and not be able to tell you because they will know how myopic they were to not just like bitcoins then without ever using it. Before bitcoin will become a mainstream payment method, there has to be mass acceptance first.