Perhaps there are investors from China who chooses to keep their Bitcoin or some altcoins. Before the total ban, it's more on them going after altcoin if I remember around 2017-2019 era, Bitcoin was not even in their top crypto if I remember it correctly. They have some altcoins that has been developed by the Chinese that is on the top. Now, it's really hard to gauge the data as the game really change already with institutions and whales are into investment with all the ETF's and other instruments and future contracts.
I've seen a lot of different research over the years and it always seemed strange to me that the top countries in terms of
"crypto adaptation" are those where there are some kind of bans regarding cryptocurrencies. However, it should probably be taken into account that a country that is quite crypto friendly but has less than 5 million inhabitants may have fewer crypto
"users" than a country where cryptocurrencies are partially or completely banned, but that country has a very large population.
As I already wrote, the countries where there are the most people who own cryptocurrencies and the countries that have the most physical and online stores where it is possible to pay with cryptocurrencies are something completely different.