PC Upgrade Help

My pc is pretty outdated, like my computer is not supposed to run borderlands 4 with a nvidia 1660 super, but it does. It’s not the greatest it’s going bad, I have to tell everyone my pc has to crash once before I can play marvel rivals or any other game. It crashes once and then it’s fine every time I start it, it gpu crashes with the screen going black and audio being there till it decides to crash. my question is should I upgrade this computer, its from 2019, or should I buy a new one? I don’t need the top of the line I saw some at Best Buy that look fine, but if I can save money?