In the end, I am guessing that it is going to be a bit of a different situation, like such as people trying to find other alternative ways to get bitcoin, because when government does stuff like this, there are majority who uses it, but there is a minority that wants to find another way without getting caught and pay that taxes and give information.
I know right, maybe this makes crypto more centralized but at least people have peace of mind when gov regulates crypto in a good way. and its just like a win win solution government have their money and people can easily exchange crypto.
Indonesia that I know had lot of Centralized Exchange and according the Tripe A survey that "It is estimated that 12 million people, 4.5% of Indonesia’s total population, currently own cryptocurrency.¹" - https://triple-a.io/crypto-ownership-indonesia-2022/
This move will give more confidence to their noncrypto users that crypto is not a fraud after all.
Because let us admit that some people are still in doubt with crypto because they thought this is illegal market and scammers are just the ones using it.
That 4.5% for sure will further increase in the years to come now that their government is already in this industry.
Other neighboring countries may soon follow, though a lot of them have their own private local exchanges already.
But it is different if the government itself is having their own exchange because the image it is implying to this market is quite positive.