Prediction Markets: SocialFi and TAM

Are prediction markets a product or a feature, how big is the TAM, and do they need to be onchain? A standalone look at SocialFi’s event-driven side.
Wedge is the Founder’s Edge

Or why you should never aim to capture 1% of a $1 trillion market. Why the wedge, not the TAM, is the founder’s real edge, with examples from Uniswap to Amazon.