I have an idea of a new new type of cryptocurrency
The new currency is similar to the currency with POS and ANTIPOS
I'll try to describe in brief

For example, we spend $ 500 a month, every new person in our system gets $ 250 if a person spends $ 100 a month  system will return $50 next month, $ 25 two month later, $15 3-month later ...
If we have 800 dollars on our account, we will lose $ 150 per month and so on until  our account reaches $ 500
first month amount will decrease 150, second - 70, 3- 30 , 4 - 20

What do you think about such system?