What is the point of being a “high net worth” person — of being seriously rich? As wealth increases, its benefits seem to diminish, or at times, lead to major problems.
It is easy to see the benefits of having enough money to afford a nice house or two, private education and healthcare, the best food, expensive cars; not having to worry about what you spend. But you do not need dozens or hundreds of millions for these. Let us say £20m in capital and property combined, and an income of about half a million, should do the trick.
A simple game illustrates why it is pointless to want more than that, unless you have an unusual reason to do so (like a passion for a particular benevolent cause or a burning desire to fly to the moon).