I would backpack through 欧洲 and take a road trip through North America. I'd buy the best tickets possible for all of my 最喜爱的 bands' shows. And then when I'm done with all of that, I'd live in a nice house with a nice car.
That's really all I want to do if I have that amount of money. Travel and see concerts. It would be amazing.
Put 75% in a savings account for your future (college fees, tuition, house mortgage, bills). Spend the rest little 由 little on some things 你 want, but do not overspend. If there is one place you've wanted to go to forever I suggest planning a trip to that place.