Can/should replace all of my 15amp fuses when buy a multi-pack?

I'm out of spares (2 empty slots) and my headlight fuse is bad, I see can buy packs of 5+ 15amp fuses for just a few bucks.
Is it OK if just replace all of my fuses since have a pack of them anyway, or are there any cons, aside from the few extra bucks spent for 3x 5-packs?