My suspicions are everywhere, OP.
I have a question that might make you more wary of accepting transaction offers from random people. Why would someone entrust you with a large amount of bitcoins if everyone can independently create their own custody wallet? If this is a sign of a scam, then there are 2 possibilities why they are offering you this job, they want your "penny" or they want to make you a puppet.

General advice: Something that looks too good to be true is usually a scam