when bitcoin have such stable prices, it could be legalized by any country to make it tradeable/ exchangeable for payment tool. because it is convenient to have stable prices if bitcoin want to be legalized. that's what i thought of

First thing that bitcoin price cant be stable on one place because its a digital currency and its related with market trade so bitcoin price can go high and low any time bust as we know that bitcoin is now of the stable and strong currency in market so there is no doubt that in future bitcoin will be with high price and also it will be stable.