So, in effect, you are advocating everyone to sell everything they own above 50,000 mBTC 
Yes, most can do with 500mBTC very well
No srsly, I added the very highest levels below, so that you can see that they are available. In the former world order (including your article), there is no "100+ billion USD" level, as you can see: it unmathematically mysteriously disappears from all lists and charts. This shows that the level should host about 30 people.* top 30 would have BTC5,000 or more (100 billion USD)
* top 300 would have BTC500 or more (10 billion USD)
* top 3,000 would have BTC50 or more (1 billion USD)
* the top 29,000 people would have 5,000mBTC or more, a huge fortune comparable to 100 million of today's dollars.
* the top 1 million people would have 500mBTC or more, corresponding to 10 million or more dollars
* 29 million people have at least 50mBTC, which puts them among the most affluent 0.6%, previously called 'millionaires'
* the upper middle class of 350 million people worldwide, owns 5mBTC or more
* lower middle class consists of 1 billion people is characterized by ownership of 0.5mBTC or more
* the lower class of (3+ billion) owns less than 0.5mBTC including people who don't have any or have negative worth.
* the top 1 million people would have 500mBTC or more, corresponding to 10 million or more dollars
* 29 million people have at least 50mBTC, which puts them among the most affluent 0.6%, previously called 'millionaires'
* the upper middle class of 350 million people worldwide, owns 5mBTC or more
* lower middle class consists of 1 billion people is characterized by ownership of 0.5mBTC or more
* the lower class of (3+ billion) owns less than 0.5mBTC including people who don't have any or have negative worth.
Notable is the size of BTC as the "basic" unit. It is a large unit, only applicable in displaying the total wealth of people who used to be called billionaires.