So this has the same flaw that Predictious has. It's building a BTC bank in addition to a prediction market.<p>That's the easiest thing to build, coming from a world of traditional fiat money banking. But BTC enables something superior - 2of3 transactions between betters. We create a 3 way transaction - Long says "I want the money". Short says "I want the money". When the bet is concluded the arbitrator says "Long won, give me 1%."<p>The arbitrator can never go insolvent - in fact, the arbitrator <i>never needs to hold a single bitcoin</i>.
1. How does Zentrade differ from Predictious?<p>2. I won't send bitcoin to a site that can't prove it controls the keys for 100% of customer deposits.<p>3. Obama vs. Romney?
Parimutuel betting pools are less attractive to truly savvy bettors, profit-motivated and deep-pocketed, because there's no way to be sure your advanced insight, at a particular point in time, will have a positive expectation when the betting is done.