I also done something like that before but only few of them are really interested in crypto.
Some of them just like to listen or hang out some of them did invest and earn from it, and I am happy that somehow I manage to help them.
Let's expect that only a few of the majority of people in our generation will have an interest in knowing what Bitcoin is. The only important thing is that you helped others by sharing it with your other friends. And what @OP did, was a really good step that he did just to teach the importance of bitcoin to these young adults. What he did was amazing because even though he is not rich but he earns enough from bitcoin trading, it still did not hinder him from being able to share his knowledge and also give time and the teaching was held at his home. this is quite strange. I hope we can support this kind of person who has this desire in his community without asking for any money in return but he gave it for free.
Many forum users have begun to educate the people around them about bitcoin in a passionate way. This is much-needed for the growth and for people to have proper understanding about bitcoin. People without proper knowledge used to fall for scams, now what they learn will let the understand what is bitcoin and how the value fluctuates. Good learning lets them go for right market decision than making random decisions.
I agree with what you said, it is true that when you lack of knowledge or ideas and you suddenly enter the crypto industry, no wonder if in the end you will become a victim of exploitative people who have no other purpose than to cheat and just take the capital of the investing in exchange for sweet promises and eventually disappearing.