Its an entirely free market. Just because one person doesn't understand the tech and loses his money doesn't mean that everyone else shouldn't be allowed to use it either.
Even if you don't buy into the crypto vision (I don't), a digital-only currency that isn't tied to any nation-state does deserve to exist.
Even if you don't buy into the crypto vision (I don't), a digital-only currency that isn't tied to any nation-state does deserve to exist.