thats the thing why most people lose money in the end , they think one trend will last forever that something that goes up will keep going up, they need to learn that everything that goes up must come down, its how its always been both in life and in trading 
no, there is no "must come down" here. not just bitcoin but price of anything, there is no obligation to come down just because it went up!
price goes up until it reaches a "balance" but will continue rising as long as it is below that balance which is the balance between supply and demand and so far for bitcoin the demand is continually rising.
the only time the rise has to be followed by a "come down" is when it is above that balance or market needs a correction.