No points for partial credit?? Well... if you believe that, then that makes Bitcoin suspect as well as its consensus mechanism is essentially already broken by the practical concentration of mining power in a single country with an authoritarian central government.

EDIT: Anyone using an online wallet is already compromising trustlessness. Heck, using common software packages that you didn’t personally inspect is also compromising trustlessness. But does this matter in practicality? Yes (such online wallets and even sometimes soft wallets have been compromised or have lost coins occasionally), but not enough to necessarily get rid of all of the utility of cryptocurrency.