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.
The most important part is the volatile part and not to tell them in a forceful manner to invest as I saw it many times when the market will turn red for several days or months. there are lots of people who will cry and will blame anyone they can blame. So it's better for them to know the truth than letting them ride the boat without warning them of a possible storm and one more thing they need to invest is the amount that they can afford to lose. so they can avoid great losses when the market won't result in promising green days.