Suppose the current debt is 23,300 BTCs which equates to $3.27 million at the current price of $140.
He can pay it back in two ways:
1) Build up his commissions, which are in dollars, and periodically pay off the debt in bitcoins. That means he accumulates dollars, then buys BTCs. If the price of BTCs doubles to $280, he will still owe 23,300 BTCs which would equate to $6.54 million. As the price of bitcoins grows, so does the dollar value of what he owes.
or
2) Take a loan for $3.27 million, buy 23,300 BTCs, return those BTCs to whom they are owed. Then he needs to generate $3.27 million to pay back to whomever he borrowed from. If the price of BTCs doubles to $280, his commissions will also double, and time taken to pay off the debt gets cut in half for a given volume of BTCs traded.
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If he had taken approach #2 after the heist, he would owe someone $250K, an amount he'll probably make in revenues in 2013. Instead, he owes close to $3.27 million.
Who would give him a loan for $3.27 million? Maybe nobody. But I think there could be investors out there. With the growth in trading volume since the beginning of 2013, the revenue growth rate is astronomical. Correct me if I'm wrong, but I think Bitfloor is the largest US based exchange. As a user, I think it's fantastic, probably as good as any other exchange, if not better, out there. There is huge room for growth here.
And he doesn't necessarily need to take a loan. He could sell ownership of 49% of the company and still keep control.