I understand the thought that you only believe those famous coin but that doesn't mean that if coin is just new you dont trust them that much because sometimes even if its new it becomes successful
Of course , some of the new coins will be successful and they can bring you lots of money. But the problem is how to identify such a coin as there are so many options.
For new investors, investing in coin like bitcoins is better. Once they get used to crypto world, they can make better decision about such a coin.