I've read from a Forbes.com article  that the demand for cryptocurrencies and Bitcoin surged along with the protest. The protesters didn't want their government to identify them, so they avoid using their current centralized payment system.
If the scenario worsens, the rich Hong Kong people might use Bitcoin or other cryptocurrencies to store their wealth but if China gets its way, they might ban Bitcoin and the rest in Hong Kong just like what they did in Mainland China.