This doesn't mean what people think it means. They adjust the inflation rate every 6 months https://www.treasurydirect.gov/indiv/research/indepth/ibonds... . Right now it yields 7.12% because the last inflation number was really high, but once inflation goes back to normal, the yield will be much lower.
but once inflation goes back to normal is not a fact. The future is uncertain, ie hyperinflation is possible.
We could experience very high inflation, but hyperinflation is becoming a random word that people throw around without understanding the definition.