Introducing bitcoin to someone is not necessarily bad, but convincing them to invest is a bad idea because we do not gain any benefit from it and can even endanger ourselves as in this case .
Actually you can get benefit if you convince them to invest and at the same time ask them to sign up under your referral link, so you will earn the commission. Or, you can create a private mentoring, convince them the basic thing and offer them to join your class if he want to learn deeper.
That's why, you should have a goal or purpose before you doing something.
It's like you're encouraging them to store their bitcoins on centralized exchanges, and how will you deal with them if there's a problem with the exchange and their assets are lost? Not to mention, once you introduce bitcoin to them, you don't mention decentralization, privacy, and non-custodial wallets...You intentionally let them store bitcoins on centralized exchanges to earn commissions, is that worth the trade-off?
I am not a bitcoin expert nor a good investor, my purpose of becoming an investor is to make money in the market. I have no intention of making money by providing trading signals or courses, bitcoin knowledge while they can be found for free on the internet. I'm not really a fan of making money using the methods you mentioned and I'm even quite against them.