144 Hertz or 4k?

I'm not sure whether a 144 hertz monitor with full hd resolution would be more suitable for me than a 4k monitor with only 60 hertz. I use the monitor exclusively for the pc and the ps4, whereby only the ps4 is used for gaming, considering that hopefully the ps5 will soon support the 4k, it would be more advisable to decide against the 144 hertz and for the 4k, right? I have never had 144 hertz and therefore it is difficult to judge the difference to the 60 hertz, but does that really make so much difference? Combination of the two is unfortunately not technically possible ^^.

Currently a PS4 only runs at 60 FPS so a 144hz monitor is unnecessary. You just have to be sure that you are buying a Ps5

Yes in any case i will buy the ps5, does that make the 144hz relevant again?

The difference is huge, but I think the PS5 does not support 120 / 144Hz, but the 4K does.