Any iPhone pros here? I need some answers

I'm running on 14 Pro that I got right at release like end of 2022, just before my first SKZ concert. I usually hack my phones and dont buy new unless its really necessary. But now Im going to see BTS and contemplating on getting 18Pro. My 14 Pro is working perfectly fine, except the batttery is now at 77% but I mean I can buy a good power bank for like 30 dollars if I need battery for the concerts rather than spending like 2500+ dolllars for a new phone. The comparisons doesnt really say 14Pro is horrible either. IDK WHAT TO DO UGHHHHHHH