GDP=MV=PQ in any currency Since M in bitcoin world is ~fixed (supply sub 1% growth and declining) the only way to grow nominal GDP is through rising velocity of money (V). To incentivize rapid turnover of bitcoin, you'd need high interest rates. High interest rates mechanically raise the probability that r>g. High probability of r>g means less investments qualify and less investment is made. In other words, high probability that vast majority are worse off.