Bitcoin will never be stable.
It would require absolute control of this financial instrument by the government,which is impossible
Bitcoin is good because it is extremely volatile.People see it as an investment opportunity like the stock market.The price depends on demand and desire.When it was rising,everyone wanted to jump on that endless growth train,but later interest faded and fear took over.
Fear that the price would soon start to fall and cause a bearish trend.
And if bitcoin has a stable price,how is it better than fiat?