But your story looks like a cookup stories, how did your suddenly invested without him knowing about the kind of wallet to use and where to buy bitcoin.
Lets cut them some slack and assume that its what happened which is maybe not a poor attempt to draw some merits.
Still advising a family member who earns a specific amount per month to invest a part of their savings into bitcoin is a good advice as long as the person investing knows the risks involved and the nature of bitcoin, its problems with the government and so on.
Assuming "Bd officer" to be Bangladesh origin, I doubt how much they are actually investing in bitcoin because of their government's restrictions on crypto.