There's no question that it's been a good investment, particularly if you bought at the right time.
$ 3k + is the right time to buy bitcoin, nobody knows the price of bitcoin next year could be tens of thousands or even hundreds of thousands, bitcoin prices are very difficult to guess.
And now the price has started to stabilize
Nah, i dont think that we gonna see such surge.
Slow and stady growth is more likely, IMO 3-5x till Fall 2018