Why not advice them to stay satisfied with investing into bitcoin instead of wasting their money on shitcoins as 99.9% of the altcoins currently trading in the market are worthless and won't last long as more shitcoins will still come over to overthrow the current so called bitcoin Killers. The altcoins aren't actually introducing anything much that's new to the industry instead they're recycling past ideas and basically surviving on the fact they can be traded on exchanges without this all alts are worthless.
This is the best call and all your words are most powerfull. Yes, we should advice all to invest in BTC and stay satisfied with it. As we can know from the previous history , all altcoins dump when btc is starting to make a rally or make a little dump. So, altcoins are nothing but just a exchanging things in exchanges and worthless without any exchange. But some of the altcoins have uniqueness and they do good in every markets. So, everyone can also take a look into those. 