I see your point, theoretically majority miners could manipulate BTC supply. The major difference is that with fiat currency control of the money supply is cent

I see your point, theoretically majority miners could manipulate BTC supply. The major difference is that with fiat currency control of the money supply is centralized, while with Bitcoin it is distributed. In addition, at the point that miners reached consensus for new BTC rules, arguably it would no longer be BTC. Bitcoin’s qualities today make it more like gold than fiat, but in reality it’s neither. “Digital gold” is just an analogy.