I'm not intending to sell for long term, don't worry. True believer here :-) But... I borrowed bitUSD for the first time to buy more BTS. Did it at $0.85 :-)) That's how good trader I am! :) I collaterized so much I still feel quite safe, but this security buffer is getting smaller and smaller each day. I'm not worried about price swings, just about potentially losing BTS because of margin call.