Not sure exactly how much money that constitutes, but assuming I somehow inherited a reasonably large sum of money, do mostly the same thing I am doing now.

Pay immediate cost of living expenses for myself and my partner. I don't have any expensive hobbies that I would need much more. I don't make a ton of money right now, yet it's still more than I can reasonably spend. After rent and food, like half my paycheque goes into the bank already. I am lucky to live in a country where I don't have to worry about an unexpected medical condition costing me millions.

The remaining would go towards charities/local political groups I am involved in. While not without precedence, it would be a strange look to be a stupidly wealthy socialist, and again the money would have no real use to me and would be better served elsewhere.