Had the incorrect wallet in their device's memory, pasted and hit send without triple checking. Rookie error.

I think even the richest people on earth will take the time to double-check a million-dollar transaction.

For someone to have done this accidentally and not bothered to double-check, it seems to me they would need to have fat-fingered both the address and the amount. This person is typing with hams.

For people with say 10 billion dollars, losing a million is losing 1 / 10 000 of their wealth. It’s as if you have 10 000 dollars in savings and lose 1 dollar in the couch cushions.

Plus that wealth is generating more wealth. Logically, a multi-billionaire wouldn’t care.

That's nonsense, not only the "it's like 10/15$ for me and you" argument quite weak, because ordinary people tend to pay attention to the addresses they send money to (regardless of amount), but people don't get rich nor stay rich by not caring about their spending either.

This guy swapped over $600k and didn't check the slippage and lost over $200k on it

https://forum.osmosis.zone/t/refund-dydx-user-funds-lost-fro...

Doubtful. Almost any other wallet seems possible, but Satoshi's wallet isn't one that you would randomly have copied moments before making a million dollar transaction.

> Rookie error.

You're obviously working under the assumption that the sender is someone for whom one more or one less MUSD makes any kind of difference to his everyday life.

bitcoin wallets would not be different by just a single character.

With binance, you have to double check the withdraw address, especially for something large like this. I'm surprised their own processes didn't flag it.

It was not directly from Binance. It went into an intermediate wallet first.