Also, it's a composite with a plastic material, and would probably resist all attempts to recycle it, resulting eventually in microplastics (contaminated with metallic silver).
Not through a chemical reaction, but a mechanical process that damages cells. The damage makes it easier to mutate. Which creates a long-term potential for cancer.
Silver nanowires should not be as strong as carbon nanotubes. But are they stronger than cell walls? If so, the potential exists for the same kind of harm as asbestos. Will we only learn whether it happens in practice only after they are widely used?
Asbestos gets into our lungs, winds up poking us, and does a lot of damage on the way out. If it ever gets out. Some fibers can get stuck for years.
It's entirely mechanical. Any strong enough fiber of a similar size and shape will create the same class of problems.
However, it also has a long elimination half-life, and it can stain the skin.
Also look up "blue skin colloidal silver."