It's too slow and nobody uses it.
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How is that possible when nobody is using it?

Coin speculation is not a real utility and user case.
Bitcoin has a design flaw that makes it distribute mining rewards unfairly, so the miners started merging into mining unions to agree about sharing the rewards equally.
Wait, so the Miner's Union fixed the imaginary flaw?

It's not an imaginary flaw. Bitcoin still as increasing blocksize, which deals rewards unevenly.
The largest merger was named Blockstream which pretty much controls all Bitcoins miners
And your proof for this is.....
Look it up. The truth is out there