Gold mining purportedly does cause inflation in gold-backed currency. I guess bitcoin mining is the same, not familiar with that other than the annoying effect on hardware prices. Perhaps the argument is that this gets increasingly harder, as opposed to fiat money creation, which appears to be exponential growth. Plus manipulation of the currency has never been all that consistent, they are constantly trying new things and pushing boundaries. so any claims of future stability comes down solely to predicting how far some president or fed chairman might choose to go next along with how other countries react to that.