My only concern is the bad part. Did you tell them that there'll be storms? Did you explain that there's a bull run but sometimes a bear run? Because I am sure that you definitely not want them blaming you for any of their loss. Whenever I bring people to crypto or tell them about investments, I also let them know that it can be risky. I hope you did this, if not, you can still tell them while it's early.
No matter how much he tells them when the market goes down, they will always blame him. I have helped a long chain of my relatives and friends to dive into bitcoins and they always blame me when the market goes down. When things are going good, they feel proud and forget but if things go slightly wrong, they are all over me.
I am not too concerned about them though because I spread the word about bitcoin not just with a charity mindset but I know that by spreading about bitcoin, I am helping myself as well since I am an investor.