I respect your point of view when it comes to bitcoin. It wasn't entirely useless if a lot of people are benefiting from it. A lot of people get rich because of bitcoin and I think it is quite rude to say it was useless.
For me I think bitcoin is not uaeless unless when you sell with it at the time that the value was in a point of decreasing.In other way we have different views for crypto currency but for me this is the best online income.