ETH,BNB,ARBITRUM is the top and a highly recommended by some of my friends, they are experienced trader and a holder,maybe they earn from this top altcoin that is why they recommend it,
We still should be careful when taking advices from other people.
As you have mentioned they are experienced and are very knowledgeable so that is why they are earning a lot however if one takes advice and tries to do what those experts are doing, they might not get the same results.
Trading and investing must be personalized and you should do what is best for you and what you can do the best.