GCC doubled in a few days.?

I think the next double or even 10x is Spectrecoin (XSPEC).  Get in early.

XSPEC is the best undervalued privacy coin.  A sleeper, and More private than zcash/dash. 
Think it will go from $0.50 to $5.00.
That's 10x. 
Longer term, think it'll be $50. imo.  Get in before others or get missed out.  Check out urself.