Heck no I don't agree. BTC has already slowed its growth in the past week or so. I think it will level off short of $5,000.00, decline sharply and stay around $4,000 until the end of the year. No huge drops, no huge gains. It will be higher in 2019 than it is today though. Probably around $13,000.00.
That is not how bitcoin works suhn 
2017 has been a Stellar year in terms of growth and acceptance of crypto and bitcoin. I mean, it's now considered legal tender in Japan? Seriously?? How crazy was that idea just last year!
So my opinion on the future price of bitcoin is extremely bullish, I think $20k by Q2 2018 is very likely. We always underestimate how much something can grow and continue growing, like the stock market now instead of correcting itself is just going up and up. Pain will ensue but as much as some people would like to have you think it's coming soon, there's still plenty of room for growth in the meantime. Shorts are gonna get rekt until the real crises comes.