Banks Using Permissionless Blockchains for Transactions Face Multiple Risks: BIS

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