I second that, but quite a lot of altcoin investors would disagree, they will bring up some success stories of how people made X amounts through investing in altcoins, forgetting about the multitudes that became bagholders or were caught up in a pump and dump scheme, or a rugpull, etc. It is safer for newcomers to buy only bitcoin, and if they understand the network well enough later on, then can gamble with altcoins if they so desire.