In my country, the government banned crypto because of various reasons( They are corruption and they can't control it). And corruption always exists in every developing country It is therefore very difficult for these countries to apply blockchain to fight corruption
Corruption is the main reason why government are trying to banned bitcoin or cryptocurrency because this technology can really monitor every single transactions. For sure, government will not use blockchain technology because they can no longer make under the table transactions. Hopefully, every government will just support this technology so everyone can enjoy blockchain technology.
Corruption is inevitable, government will always steal money from the people by placing taxes on their salary and different products and assets that is being sold on the market.