Just think about this?! Why should companies like McDonald and Sturbucks use DOGE? After all, the most stable cryptocurrency is Bitcoin. If ever someone chooses cryptocurrency as payment, it will definitely be Bitcoin. There is no doubt! The most stable and the most popular - it is enough.
We cannot call Bitcoin a stable currency 
, you can say that it is the most trusted when it comes to the cryptocurrency market and most of the coins can be trusted for its intended purposes.