> BTC has basically zero of that, as evidenced for the fact that there isn't a deliverable version of this contract. How can anyone claim Bitcoin is a useful c

> BTC has basically zero of that, as evidenced for the fact that there isn't a deliverable version of this contract. How can anyone claim Bitcoin is a useful currency if it's less practical to deliver than, say, KC Winter Wheat? > And 20 minutes...is an eternity This is for a futures contract one month out. You would close your position at the same time that you agreed upon the rate for the blockchain transaction. When you sold the BTC you could verify receipt of the USD quickly (fiat FTW), whereas the blockchain propagation time is more of a risk to the BTC buyer.