Scam, after scam, after scam, after scam...
Still waiting to see even one single useful use case for cryptocurrency and block-chain storage. It's all a grift to take money away from stupid retail investors trying to get rich quick.
Useful because it would have lower administration overhead than one bank maintaining a service for exchanging funds, no concerns about downtime, and all sorts of guarantees about the correctness of balances. Lots of back end software that just doesn’t need to be written or maintained.
Lots of similar usecases where small mostly trusted groups need to keep track of asset transfers or trade between them.