better you can invest in bitcoin right now because if you are not investing in bitcoin and waiting too long to be able to invest in bitcoin it will make you lose and will make you run out of time and not be able to enjoy the time to get profit.
I also hopeful about the future of bitcoin, but the current situation tell that in this year it is not possible because of the rough market situation. Everything is red today and there is no green signal in these days. Therefore I think the price will increase but it will take long time. Now people are optimistic that the next year 2019 will be good for bitcoin.