I think this person is mostly off the hook here. To begin with "I believe" makes it clear that this is an opinion, not a statement of fact. They aren't saying "

I think this person is mostly off the hook here. To begin with "I believe" makes it clear that this is an opinion, not a statement of fact. They aren't saying "bitcoin will be popular because personal computers were popular" they are saying "I can see similarities between the two". They aren't even making any specific statement about bitcoin beyond it being controversial and interesting to nerds; both of which are already true.