What can we expect for the upcoming years... So far we can say Bitcoin has just boomed into public awareness. This means that people who hasn't yet invested into crypto coins, still is in the very first stages of the "future money's" life.
A fact about this is, in 2017 the 60% of population has a bank account and only 0,1% uses cryptocurrancy.... Based on that we can say, as some experts said, we can expect other people from big money companies for instance from apple will invest into it, so we can expect a new boom in crypto currency.
Last two weeks showed really to the average people what a pitty was to not to invest into Bitcoin in 2013-14, when it was around 100$. This means a lot of them started to talk about maybe invest in it, even this post can give a bit to its worth.
The thing is, not much of them know a lot about a lot about the else than Bitcoin, so I think Ethereum, and IOTA, they have their chances to overtake bitcoin, but just when people really understands the valuable pros of them.
Now as so many people says that it is just a bubble, I think here you have to understand that a bubble is when people invest a lot of money into something that doesn't change. Like you paied 50$ for a steak, now you are paying 1000$ for the same steak. When people realizing this, they'll take their money from this.
But its important to understand , blockchain technology is constantly changing, getting better, the question is until when ?
I think we can expect Bitcoin to reach untill 30K next year, and maybe it is going to stop around there.
Disclaimer, this is my personal feeling about is.