1. A guy with $164 billion is willing to pay $250 million for it. 2. If in the future a Peak Oil type scenario arises, and electric planes aren't able to overc

1. A guy with $164 billion is willing to pay $250 million for it. 2. If in the future a Peak Oil type scenario arises, and electric planes aren't able to overcome issues of battery energy density, and power-to-gas doesn't come through either, some replacement form of air travel might be very useful. Low probability, but very high reward.