No,dont listen to this fag.
The moral of Kaiji is to always try your best. It's meaning is to teach you what type of shit situations you can get into if you dont take full advantage of life. Hence why its called Ultimate SURVIVOR Kaiji. Kaiji is always in bad situations but he is always taking offers made to him as he has no other way.
In short,it wants to teach you to not fuck up the oppertunityies you are given. Pursue them with EVERYTHING you have.