Levin calls the rules „promising"...
He does get that he can't kill whoever he acquires coins from, right?
And that with the way he acts giving people his coins won't be enough to keep them from shiving him.
I think your misunderstanding Levin.
He isnt about killing people, or even screwing them over for the lulz.
The only thing he focus on, 100%, is advancing the cause of Levin.
He would not care if every single participant walked out alive, as long he had all their money.

And i think he is to confident to believe someone else would be able to shiv him.