It allows you to send money overseas very cheap. If you moved to a different country, cryptocurrency saves you a lot of headaches with exchange rates and bank fees.

It also allows you to lock down money into a program and distribute it systematically without anyone being able to touch it. Think mass donations being automatically distributed to a select number of organizations, but instead of trusting that the fundraiser doesn’t pocket any money for themselves, you make it impossible for them to do so.

It also doesn’t run as a company so it needs no offices, no employees or bosses, so theoretically it is more cost effective than traditional banking. In a way it is like the fediverse where instead of relying on one big bank service, many people host their own ones, and just like the fediverse, you have some hosts that you can trust and some that you can’t, and while it is more expensive to keep track of multiple instances, that simply is the cost of decentralization.

You’re not really supposed to earn money with crypto (unless you host a node), just spend it or use as your own private bank.