Comment by astoor

The problem is that any "legitimate" use case is negated many times over by all the illegitimate ones. It would be like saying let's legitimise terrorism because sometimes the terrorists might (just might) be freedom fighters, when in actual fact terrorism on the whole does way more harm than it does good. In the opening example, sure some money may have got through to Ukraine via cryptocurrency (although some was stolen by scammers pretending to be Ukraininans, and more much money was transferred more securely and efficiently through traditional means), but any good that did was completely undone many times over by Russia's use of cryptocurrency. Put politely, cryptocurrency is a net negative for our society and environment (by a considerable margin).