Earlier quoted context omitted.
Being worth 50 million puts you in the ultra high net worth category (>30M$) and you live an incredible lifestyle obviously. But your entire net worth is 5% yearly interest on a billion dollars. It's hard to imagine for regular people just how far a billion dollars is, you're essentially royalty at that point as far access to anything in life is concerned.
Yes, by the numbers million vs billion is massive, yes, but for quality of life and for worrying about monetary things? You no longer need to be concerned about food or any type of shelter. It's a matter of the size of yacht you can buy.
(Obviously putting $1b entirely into a savings account is a terrible idea, just making a point)