I think my brother got scammed by a co-worker. What do you think.

Let me start with saying this thing had a ton of red flags to start with. I had warned my brother, multiple times, that this was an obvious scam.

It started when my brother got introduced by a co-worker to this website that connects to your wallet which offers an insane amount OP interest.

The APY like 5% per DAY(!), the co-worker claims to have been using this site for over a year and of course had gathered alot of interest buying all kinds of fancy things.

My brother started with 50 euros, of course he started receiving interest, he was able to move the funds around so he trusted it.

Then he decided to put some more money, about 300 euros, and a day later all the money was gone, the money from the co-worker supposedly also got taken.

At least my brother listened to my advise to at least use a new wallet when trying this out, so he only lost what he put on that site, the rest of his coins are safe.

My brother thinks the co-worker acted in good faith, but I believe he is 100% in on the scam, what do you think?