The main feature of cryptocurrency is independence. Crypto provides some kind of economy freedom. No more banks setting the rules and controlling the money, no more powerful people who decide what is going to happen. With crypto people who using it are setting the rules. Finansical anarchy. And this feature is might be really helpful in some cases. I don't mean criminal acts like buying guns or drugs or doing other bad stuff. I mean that sometimes a really bad things might happen and you may need to buy something fully anonimously. If you are in some political trouble for example and want to get away from your county and danger it provides to you. And independence of cryptocurrencies will help you with that.