We already know the Chinese bank is developing its own digital currency. And we all know it should be quite different from cryptocurrency which we like, they're just replacing paper money with digital currency, which is still centralized.
Of course, all national crypto-alyuts will be centralized, states can not issue decentralized digital coins. However, I recently read in the news that China is not in a hurry to create its own digital coin. While we do not see how effective or useless national centralized digital coin. Only Venezuelan Petro appeared, but there immediately appeared problems with the legislature, which recognized this coin as illegal. However, we need experience in the operation of such centralized coins. If they fail, this may indicate that the most effective crypto currency can only be decentralized.