I just want to share my experience, I have a relative who come to me and ask advise on what coins to invest now, I don't name a coin and I said he must do his research but he insist that I know, he want to invest immediately.
I know he is into FOMO because he seems so aggressive and like to get instant return.
He told me that since I'm a veteran, he would like to ask some advise on what coins will pump in the coming days so he can invest on it.
I don't see any issue at all if he insists on asking what coin to invest, then give him the top 5 coins on the market to invest, because these are the coins that are guaranteed to make the most profit, and there's always liquidity, he can always sell his coins if he decides to sell it and invest on other coins or from other reasons, there are trap on FOMO make him understand the many risks of investing in the Cryptocurrency market.
It is generally recommended to not give out financial advice, since you cannot be exactly sure on the outcome of your investment. Mentioning five coins isn't ideal either. There are more than a few examples of coins that have crashed and are yet to recover where they used to be (See XRP). I don't know if it's just me, but I prefer not to provide anyone with such information, I've had incidents of being whined about Bitcoin or Litecoin in market dumps.
I can't be responsible for their own moves, not my fault if you buy in ATH and then proceed to panic sell, but I don't want to get bothered or whined when something happens.
I understand you and I also prefer to not give financial advise to prevent issues with the person later if the investment turns negative.
But since the person is insisting too much I would let it very clear that the profit isn't guaranteed, especially on short run and he would have to be responsible about the amount to be invested and for any consequences of this investment. Furthermore, to prevent even more problems later it would be better to tell him, as a newbie, to invest in bitcoin and ethereum only, as these are the most trustful currencies in this market.