I reckon it'll have a few ups and downs, have a massive spike up over 1k within a couple of years, stay there for a bit, then crash haha. I think bitcoin will either go fully mainstream within ten years or it'll be forgotten about as a fad of some sort.
Yeah and I believe 10 years is also a long period. Lets keep it for next 5 years and we will get the exact picture of it. And in meanwhile there would be some new cryptos entering into market so we need to see whether bitcoin can survive and compete with them or not.