This is the basic principle of investment, and if you give someone an idea about investment, never involve yourself in it. Ensuring your own safety is very important, someone will invest with excessive expectations from your words, but if they do not get the results as expected, they will blame you. And it is very natural to blame them like this. So if you want to explain investment to someone, you have to explain it in such a way that he himself takes a long-term investment decision. Just educate him about investment, if he is really interested in investing then common sense will be enough for him.
one needs to be very careful when they tell people about how to go about an investment because some people just only focus about the profit people can earn from bitcoin but forget to tell about the risks that are there in the investment. may be they feel if they let people to know about the risk it will scare them away from having interest but the best thing is to just go ahead and let them know everything, the volatile nature of the market so that if they start investing and they invest wrongly they will hold their self responsible for their mistake.