Your question depends on your SEO strategy. Companies that have a thorough organic strategy have content mapping, where they produce digestible content for consumers in each stage of the "buyer's journey."
If you push out relevant/engaging/high quality content regularly, then AMP might be worth your time, just to give consumers a faster way to interact with your content and stay in the limelight of your competitors.
If consumable content isn't a big part of your strategy, then I wouldn't necessarily bother. The ROI most likely wouldn't be very high and you could get more value focusing your efforts elsewhere.
AMP, to me, is more for news sources, blogs, or sites that focus on content (e.g. someone like Buzzfeed).