You're thinking of Taiwan, not Hong Kong, HK is a province of China and despite the so-called one country two systems it's still China that dictates everything., the governor is pre-approved by China, the Legislative Council members need also pe-approval before "election" so in all it's just a big farce, they let Hk a bit more freedom so not to spook others but in reality, it's faith is already sealed.
As for the news itself, there is a lot of maybe, sources, it can be possible, while even some in HK are skeptical about this.
Consumers are banned from trading cryptocurrencies currently and only licensed traders with capital over $1 mil are allowed to take part in crypto trading, this doesn't mean they're allowed to operate with real currencies, and I assume that even in best case scenario this will be the same for users even with the new legislation, you're basically going to trade cryptos just how you trade gold, without once touching the real metal.