It depends what short sellers actually shorted. If you look at BTS chart in USD (http://coinmarketcap.com/currencies/bitshares/) you will see that our bottom price hover around 0.0030$. It goes up from there and get back down with a little increase. If short sellers would have short at these low prices, they would have win a big deal if money repeatedly. The prob is that they short when BTS went out (2014) and was overpriced and started to go down slowly, shorting in a down tend is dangerous. BTS is not responsible for bad trading decisions.