You might not have to worry about your or your kids getting kidnapped if you're "only" a millionaire. There are probably other security considerations, too.
If you are "only" a millionaire in a HCOL area, you might still have to worry about crimes against your children. However, they will be random crimes that occur within the city you live rather than targeted crimes.
I have a friend living overseas. His children go to school with a Russian oligarchs kids. Visiting the oligarch's home for a birthday party was wild.
