My advice, don't give out advice. Or at the very least tell them they are better off not investing, you won't be blamed if there is a bigger correction.
I just think that it's better to give his relatives some ideas about crypto, not totally advising on what particular coins to invest to.
Per experience, most of the coins in the top 20 ranking appreciate in value overtime and if you hold into it i think we still profit though it will take some time but at least it is still a gain, this should be emphasized to someone seeking advises about cryptocurrency.