A lot of people who are making $300K a year in Silicon Valley are going to be in that situation around age 50.
Among the things that a SV engineer who manages that has to think about is if they have children, what happens when they die. It's nice to pass some things on to your children, but at the same time, plopping a million dollars in assets down on your kid all at once may not be doing them favors. Best to look at your options. (I'm not going into it here just because it's really more than fits into an HN message, nor should you take the advice from me; I'm aware that there are options.)
I know a couple who blew through $15 million. The wife ended up working as a cook in a restaurant.