Typical web3 guy thinks he knows it all.
Even if the individual is a Bitcoiner, there is no reason whatsoever to trust the person because the foundation of crypto was built on a trustless society, decentralized network, consensus mechanisms, and blockchain.
But when people ignore the concept and the foundation on which a certain thing was introduced and trusted by early adopters, they end up taking the wrong steps and focusing mainly on the system's benefits.
This is what we're seeing in today's crypto market, where influencers and celebrities play a major role in the investment decisions of some people.
Funny thing is, the friends he keeps have the same mentality as him, they believe that Telegram wallets, Metamask wallet, and add-on wallets are the best ways to keep your crypto coins safe.
If you have advised them, but they choose not to listen. Leave them; they will wish they had listened to you after they have learned a huge lesson.