History tells us countries like China are buying physical gold and have it shipped just quietly stack physical gold and are de-dollerizing as we speak.
Why buy? To be successful in doing the same thing for BTC isn't exactly difficult: secretly shut down mining farm, making confusing scam-syndicate claims against bitcoiner saying you all have something to do with money laundering whilst confiscate mining equipment and nationalize hash power to gain traction on acquiring newly mined bitcoins.
Based on those alternatives, there is no point for the money changer to buy it with either depositors fund or reinvest their revenues