For me, I want to keep them all!Well, I can't argue with that. But I guess it depends on how many new cameras you buy and how many of the old ones you want to keep.Other than "money-wise",I agree with Greg. Having said that I bought the original X100 when it came out and even though I now have the X100F, I kept the original. To me it's just a classic, the first of its kind. Other than that, when I've purchased a new camera I've sold the one I am replacing.It makes zero sense to keep both unless you are collecting old camera bodies in a closet. (You should see my closet.)
Sell the X100f immediately while it is still worth something. Shoot the new camera.
I really don't understand why people sell off their perfectly good old camera once they buy a new camera.
For me, after buying a new camera, the old camera can become a backup camera.
Cheers!
Cheers!