I absolutely understand what you all mean but it's 0.01 BTC, we are not talking about lifelong savings. I'm also relatively relaxed because we're not in the bubble phase of the market just before the top, so if history repeats itself, it's unlikely to lose much money for anyone investing now.
The money your dad has invested may not be a lifelong savings, but is your dad aware of the risks of his investment, or has he only invested because you convinced him that it is a good investment. I discovered that when most people are talking about BTC with their families, they only tell them how they are going to become rich if they invest, and they let them find out about the risks themselves after they have already invested. You dad may not have invested much for now, but what if he intends to buy more?
I do not convince people to invest in BTC, but for those that do, if you convince people to invest in BTC without telling them about the risks, just know that you are the one carrying the risks of their investment, and that is not a good position to be in.