To Share or Not to Share Via FanFiction

This is a questions I’ve been asking myself recently. I’ve written a new novel; The Fifth Day. Actually, I finished it last summer, but between working for a living and digesting review comments, I was at a standstill. Now I’m refreshed and no longer paralyzed at the thought of a rewrite.
So my question is, once I’m ready to share, should I post on a FanFiction site or two?May authors have gained traction this way, but is it safe? How is it regarded among authors, editors, agents and publishers? I’ve heard Fifty Shades of Grey got started this way. Hmm. The prospect has me thinking. Let me know your thoughts. Would love to get feedback.

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