It has happened before where the son or daughter of a super-rich millionaire or billionaire, or whatever, is on drugs, and maybe they want to stop and refuse to pay the dealer, and the dealer kills the client anyway. But my question is: why? Wouldn’t it make more sense to steal from them or something?
Balance an equation between what you are owed, how difficult it’ll be to recover the debt, the chances of them implicating you in supply, and what message the killing will send to others… if you think it’s worth it then go ahead. Personally though I’d try to extract (at least some of) what I’m owed - but if all else fails and you’re criminal standing / ego is damaged then you may well go ahead anyway.