My 2c... more likely and age/experience thing.
> I am considered an Icon in my industry
If you're a recognizable face in the industry then you should keep the hair. Imho. If it's part of your "look" and/or makes you recognisable then you'd be mad to cut it off. Imho.
I presume you are looking for consultancy business and/or work on the basis of your reputation, in which case you actively want people saying "oh yeah that's that guy, I've heard of him". Cutting if off makes you just another interchangeable middle age guy; they probably have a queue of those around the block.
My 2c, based only on the information supplied in the OP.
YMMV.
