It will be interesting to see if interest rates in government controlled currencies and crypto currencies will stay diverged in the long run. Without the distorting action of governments printing money, interest rates might be set by market forces in "crypto land". This might lead to a long term situation where artificially low interest rates are paid in government controlled currencies, but market prices are paid in…
Also real interest rates are set by the market not governments. Monetary policy has, at best, only small effects on real rates (in theory it should have none).