There's no guarantee that btc price will go up in the next 10 years. In fact, it can go down to pennies. Remember, what goes up, must come down.
if you look at the all-time chart you can see that bitcoin is actually rising(average rising) every day by a few cent, if this trend continue, bitcoin is aiming at going up and not certainly down
Exactly, picking out arbitrary time frame from the peak @ end of 2013 until now is a bad way to view the situation. Watch this video it explains future price movements: