Earlier quoted context omitted.
There's not a single problem it solves. A technical solution in search of a problem is a hilariously poor investment, esp when any distributed system will do the same work - but better. And all the "value" stuff on it like NFTs is just a giant ponzi scheme from any way you look at it.
I do think there is at least one problem that crypto currencies solve better than the status-quo: sending money internationally. It has less regulation than the official channels. Can have better privacy. Can be cheaper. Can be faster. Compared to Western Union, international wire transfers and the likes, sending money home for foreign workers (remittance), seems to be much better with Stellar, or other low-fee crypt…
Genuinely asking as a newbie to this kind of thing, what's the advantage of using crypto over assets more traditionally used for this purpose such as gold?