A lot of people compared to the market value of the dollar, so even if they came out, one bitcoin was worth $20,000, $100,000. Many people think that a good currency should not be a big flop. A widely used currency should not rise and fall.
Most people have no idea how FIAT currency system works - FIAT market totally restricted and regulated by central banks mostly because it is centralized.
When the price of USD is too low/high then proper market instruments are being introduced - for example, change in interest rates.
All this in order to make FIAT currency as stable as possible - with Bitcoin such level of control/manipulation is not possible.
We either would have a semblance of stability with centrally controlled market or decentralization with high price fluctuation.