“When you use Signal, your data is stored in encrypted form on your devices. The only information that is stored on the Signal servers for each account is the phone number you registered with, the date and time you joined the service, and the date you last logged on.”
Not all crypto is currency, even. The coolest shit is just decentralized versions of things we have already.
I’m particularly interested in things like Arweave. Smart contracts are cool too, though, to be actually useful, governments need to embrace them.