It's no doubt in my mind that Bitcoin can and will go higher in the long term. But before that happens, there needs to be a massive downturn like there has always been in every Bitcoin bull market. If you look at the chart, you see that a reversion to the mean has to take place. If you've been studying markets long, you must know that no market can go in an upward direction forever and still be a wise investment. Bull and bear markets must take place.
Personally, I am holding LTC that I bought quite a long time ago, and a few other alts. Besides that I am staying cashed out until an amazing buy opportunity comes along. I am not saying Bitcoin won't go higher, but this is the longest bull market it has ever had. It's previous bulls only lasted about 3 months.