well if you think about it, there aren't very many people who are fully on-board with any given cryptocurrency, conceptually, who don't also have literally vested interests in said cryptocurrency. when you have literally vested interests in something, you're going to be defensive about your investment, possibly to the point of emotional irrationality. this makes conversation between the invested and the skeptics pretty useless most of the time—if a skeptic were to convince an investor that their cryptocurrency is bad, then they would pull out of investing in it. if an investor were to convince a skeptic that their cryptocurrency is good, then they would likely also become an investor.
put another way, there are broadly four possible types of people who would discuss cryptocurrencies on a website like this:
A) crypto fans who have invested in crypto
B) crypto fans who have not invested in crypto
C) crypto skeptics who have invested in crypto
D) crypto skeptics who have not invested in crypto
for obvious reasons, you aren't going to find many—if any—people in categories B and C, so that leaves categories A and D arguing with each other, and largely unlikely to change each others' minds—especially category A, because, again, they are literally invested in the thing they're a fan of.