Shorting bitcoin is always dangerous (zooming out on the graphs) so good luck with it!

I think the value of Bitcoin is more than just what it is used for, its tx speed, etc. It is more the coin to prove that the fundamentals work and it will be paving the way for whichever coin(s) will make the race in a couple of years time.

Also, don't forget that just because it is a bit outdated in its current state doesn't mean that it can't be modified and improved (like many technologies!)