5. I could sign wallet containing good chunk of those coins but I wouldnt say that would be the smartest thing to do
To prove that you own those coins, you should sign them with a wallet that contains your coins. That's the only way.
If he sign a message with stolen coins it would be the most dumb move of 2024...
What i don't get is how they used the same seed, it has sense that you were able to exploit it if you could predict the outcome of the next bets, but as a developer, i could say that seed should be generated in a random way.
My question is:
Why didn't you report the bug if you were there as a tester?