BTC domination is already now at 52%. I think this is the right time to enter into BTC. Anytime from now, the bubble may be huge. So, enter if you don't want to miss the boat. However, it's your own decision. Don't blame me later. I only can assume.
I believe within October, 2018 BTC will cross $20k.
I think you are right. Most likely by the end of the year the price will grow very much on BTC. Therefore, I advise you to buy coins now.