I too think BNB will go at least another 5-10x from here on. The BNB Exchange is looking awesome.
Another amazing project is Viacoin.
Honourable mentions:
POSW (when POSW 2.0 comes out this is hitting a dollar minimum)
Waves (Will be an awesome platform)
Waves x100 is going to be tough!! Maybe x10...
POSW and VIACOIN have a lot of potential.
x20 for VIA could be "legit", in the $400M MCap
POSW has probably the most potential here. x100 maybe... when it goes 2.0 and hits some bigger exchanges (for the liquidity).
BNB already hit its max. x2 doable... at best. it's already a $100M coin!!