I suspect it will be lent out to be played at various festivals, and charity events.I doubt the person spending perhaps seven figures or more will be actually playing it. It's a collector's item.
Note: I'm not saying that people who pay that much for a guitar never play it, but I doubt it will be a popular enough musician that has that kind of cash that buys it and gives it the attention it deserves, but I base this on probability alone. Many more multi-millionaires out there that are not pros or even musicians would be interested than otherwise. I could be wrong on all of this though.