I think, for most people it would depend on whether this happened gradually over time or suddenly, how much they had prior to this “event”. and their stage in life. I don’t think there is anything “magical” about $10,000,000. Perhaps I would ask the question a little differently. If your assets were increased by a factor of 10 immediately, what would you do differently in the context of your stage in life.
It does take a while to get comfortable with increased wealth and is much easier if it happens over many years. Just speaking hypothetically of course, but I would give a lot more away, likely through a family foundation, upgrade a couple of homes, maybe get a big boat. Probably hire a “Family CFO” to look after it all. Probably a more conservative AA.
In the end though, unless it actually happens to you, you don’t really know what you would do.