Only an independent central bank with a strong mandate can provide the institutional backing necessary to issue reliable forms of money and rigorously preserve public trust in them. So private currencies have little or no prospect of establishing themselves as viable alternatives to centrally issued money that is accepted as legal tender.
And we need to continuously assess the combined effect of our different policy instruments, the risks of non-linear effects and the spillovers from policies adopted elsewhere. This means our monetary policy should be data-dependent and adaptable. And it requires us to shape our communication on the basis of our monetary policy reaction function.