Upgrading my little brother's pc from a 1050ti.

Should i lend him my 2070 or should i get him to work and pay the difference to upgrade to a 5070 since he wants the upgrade ?

I told him to use my 2070 for now and save for a 5070ti instead since he's playing games like Fortnite, Minecraft and Marvels Rivals.

the 2070 would be resold or rebuilt into a new machine for my cousins as a family pc otherwise