I'd say it's Estonia:
"Today, almost all public services in Estonia are digitalised and accessed through secure digital identities that are provided to every citizen and resident."
"In Estonia, this distributed ledger gives citizens and residents more control over their own data."
"Estonians can log into their own records using their digital identities and then see exactly which medical professionals have done the same and when."
Source: https://medium.com/e-residency-blog/welcome-to-the-blockchain-nation-5d9b46c06fd4
I think Switzerland is also a great country for it - long tradition of banking and privacy, crypto is an asset, government open to crypto, so on.