They mention that they are immediately exchanged into their national currency. They would be exposed to the price fluctuation for half an hour maximum. Block co

They mention that they are immediately exchanged into their national currency. They would be exposed to the price fluctuation for half an hour maximum. Block confirmation is around 10 minutes, and you need to wait 2-3 blocks to be certain. Of course a lot of things can happend to the price in half an hour, but that's another story.