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.
However, if the price decreases, after you work hard to convince someone to invest and, at the same time, use your referral link, you will be attacked by accusations that everything is not going as your referral would like. Why do you need to have this headache?
On the other hand, going back to the OP's story, many people are boastful. But boasting is a character trait of those people who like to assert themselves at the expense of others, those who try to prove their superiority literally in small things. Self-sufficient people know the value of their words and do not need proof that they are right. And when it comes to owning Bitcoin and generally speaking about their successful lives, they prefer to behave modestly while maintaining confidentiality.