Everyone has different risk tolerance when it comes to altcoins.
Some like to play it safe and only invest in top 10 coins, that is fine if you are happy with a 3-5x this bull run.
But if you want more returns then you have to go further down the list and take more risk.
I have a mixture, with the likes of XRP however i got into it below $0.50 last year, I would feel a bit uncomfortable buying it now at $2.50 but I do believe it can see $10 this year so if you are happy with a 4x return then go for it.