2018 in btc price: 2000$+
I do not share your optimism. Indeed, after the recognition of bitcoin as a means of payment, the price can rise to it, but as soon as other currencies feel it as a competitor and will fight with the bitcoin price may fall. I think this year the price will be 1200-1300 $
Yes. Bitcoin can not grow so high. There will still be small drops, it's not as stable as gold. 1000-1500 $ maximum.