Time to look at the basics.
You've a finite amount of this 'digital asset' which has come through ridiculous amounts of regulation and other negative impacts, an ever increasing amount of demand for it and accessibility improving all the time. I very much doubt this 'stability' will last long!

The buying and selling of BTC is on an equal footing. Investors are trading all over the hours, because too many altcoin was born that made the price of BTC stable.
Sorry to say, but I think you need to redefine your definition of stability because as far as I can see, this still is the most volatile asset on the face of earth. Bitcoin is a long way from becoming stable. Any market takes many years before it achieve stability and crypto currencies are yet in infancy. More and more people are getting aware of this coin and the investment is increasing.