[endangered]

> The ethereum network rewards miners with 5 new ETH approximately every 15 to 30 seconds (~18,000 per day).

This is not true. After the last hard fork, the reward for miners went down to 3 ETH.

[panarky]

It's a little complicated with uncles, etc., but the net result is more than 20,000 brand new ETH created every day.

Here's a chart of daily block rewards.

https://imgur.com/a/JG9W5