Something about distribuction

Hi guys, a question: “distribuction” is the total coins mined, or the number is affected by buying or selling them? I mean, if a billion of coins is traded with other coin, the total number of coins will decrease?IMG_20181012_032614_016|281x500

Here is the meaning of distribution:


I am also not aware of Electroneum being burned upon being traded. I know block reward reduces as blocks are mined: Visualizing ETN block reward reduction

As far as total mined coins:

Subtract Circulating Supply by Premine, and you’ll have an approximate number of mined coins.