Tell me a single useful real world use case that Ethereum is being used in today, a decade after its creation If I can solve that problem with another simpler,

Tell me a single useful real world use case that Ethereum is being used in today, a decade after its creation If I can solve that problem with another simpler, older technology it doesn’t count as useful. I don’t care if you can pay for things using ethereum when I can just use my credit card instead.