If you mean that you are going to use a subdivision mod on it then depends on the geometry. Ngons are sometimes fine but on something like a round indent the subdivision mod will mess up if you don't connect 1 in 2 of them I think.
That aside, I think you have way too much geometry in there if you are planning to use that as the low poly version. You can make a circle with just 6 or 8 vertices. (6 will require all of them to be connected for no deformation, 8 only half)