Well. This transaction took place quite recently - a few days ago. I assumed that perhaps this happened many years ago, but I was wrong. Checking blockchain confirmed that the amount of 75k$ was sent recently.
That should not be a mistake but to burn it. Every bitcoin burned adds its value to the remaining coins in circulation.
I had a similar thought and the person who sent 4
BTC can afford to donate that amount. In fact, he definitely managed to burn it, and these 4
BTC can certainly be deleted from the general circulation of bitcoin.
To me this doesn't seem like a mistake, but rather a deliberate action. It is impossible to say exactly who and why did it.
Proponents of amazing theories may say that it is OP who sends btc to himself from other addresses.

But this is impossible.