Laptop or monitor?

Laptop or monitor?

Laptop, since a monitor itself would not display an image…

Monitor

So if you mean using a laptop monitor or an extra monitor, then the extra one

When asking the question, I could ask an equivalent counter-question:

Car or tire?

____

If you already have a PC, a monitor makes more sense.

If you do not have that and would like to operate the "monitor" in standalone mode, a laptop is better because the screen otherwise remains black