People just have the misconception, that fiat price is controlled by the government.
Do you want the truth about how stable the USD is? The Chinese could destroy it in a matter of hours maybe days, if they wanted to.
Looking at the BTC/USD-rate and than talking about 1 USD=1 USD is also just a pretty stupid USA-centric way to look at it.
You can look at exchange rates to other currencies. You can go to Walmart and look what a loaf of bread costs in comparison to a certain point in the past. That is how you determine the value/volatility of a currency, not by saying 1 XYZ = 1 XYZ.
So, drop the "USD is stable"-Bullshit, if you want a serious discussion and than we can talk about, why USD is more stable than BTC.
btw.
Im not talking about having large funds and making sure that the price cant move,
is one of the reasons for that.