4- I did say it multiply time and i would explain the strategy to him, if he were interested to pay 0.1 btc for chance to get 38btc.
Paying after successful job.
Everyone here is so blind how he was not even interested paying 0.1 for 38btc which makes me think his scam report is fake
not interested? The chat log would indicate differently... in fact, he was willing to pay MORE

immediately following this... instead of revealing your "master plan" of exposing the scammer, you basically just tell him to pay up... MULTIPLE times

5- No sense of person not agreeing paying them in words so he could collect more information about the case.
You had MULTIPLE opportunities to mention your "master plan"... and yet you failed to do so once... even after he says
he'll pay you 3 BTC if you help!!?! All you do is repeat "if you don't give them money, they won't unlock your account"
6- I didn't disclose the part because obviously the scam report is fake, why would then someone refuse paying less money than hiring a lawyer to someone who wants money after the job is finished?
yeah... "obviously" fake because he doesn't want to follow your incredibly bad advice and pay scammers...

After telling you AGAIN that he would pay:

He says the smartest thing in that entire chatlog:


Maybe the answer is to just say nothing... #JustSayin'