It's not rare to see people who underestimate about something that they just heard, they need proof to convince their self if bitcoin is really legit or not. but when they missed the train they hope to go back in time so didn't miss any investment opportunity.
True. When I've talked about bitcoin to my few friends, they've doubted me and never got interested. But when they've seen that the price gets pumping, they started to notice it and became interested all of a sudden. There's a need for them to validate first the information even if it's coming from a friend of theirs. That's why, I don't trust any of them anymore since they didn't trusted me and doubted what I've told them about bitcoin and trading with it is a profitable thing if they get to understand how the market goes.