Banks using permissionless blockchain for transactions face multiple risks, says BIS Basel Committee

Banks are also exposed to political uncertainty as new legislation could “change the behavior of the validator”, making “blockchains themselves operationally unstable”. A ban, for example, could “reduce the amount of computing power or native staked tokens available to secure the blockchain, temporarily increasing the risk of a 51% attack,” where “a coordinated effort is made to control more more than 50% of validation nodes”.