I think this is why Stan wants "heroes" to kick start his project. To maximise your profit yes you should go for BitUSD but what if you have a ton of buyers in the HERO:BTS market and not so much in the USD one ? You could short big sum of money without porblem. Impossible now with BitUSD.
I think the combination of whale shorting HERO and a big demand for the token will create a healthy and very liquid market.