Some lenses would be worth an adapter, but maybe not this one. The Canon FD 85/1.8 was one of my best lenses in my Canon T90 days. However a used Nikon 85/1.8 will render services at least as good without any adapter.
On the other hand, the FD could well be used on m43 (especially Olympus, with stabilizer). It is not as good as the Oly 75/1.8, especially wide open, but the latter is an expensive piece of optics. FD lenses are a bargain nowadays, and a good treat for m43 cameras. I still regret not having bought that Angénieux 180/2.3 with FD mount in a pawn shop... but that was before I got my first m43 camera.