Re: I am no lover of the Chinese political system
"The Chinese Governement will only tolerate digital coins whose supply they can control, the same way as that of ordinary money."
Not that it matters to your argument, but neither China nor any other country can actually control their money supply. The vast majority of the money supply is private debt, not government IOUs. About the best the government can do is try to influence the money supply by tinkering with interest rates, forbidding or impeding some types of transactions, taxing some transactions and maybe throwing some folks who have annoyed the regulators or the public sufficiently into jail.
I doubt the Chinese actually much care one way or the other about crytocurrencies except to the extent that their energy usage and risk of collapse are potentially destabilizing. Crypto's problem in China is probably that it has grown or is growing too large.