This is the best way of persuasion, and we don't need to explain much to them. I have also used this way with my loved ones, I don't want to waste time explaining their doubtful questions one by one, and I show them the results I got from my investment. Even though they haven't gotten into bitcoin yet, at least they stopped doubting me and started listening to what I had to say. I don't advise them to invest, but I tell them it's an opportunity, and it's up to them whether they take it or not. I won't get any benefit from them, so I don't want any responsibility to them, what I want is just to give them a chance, and the choice is theirs.