Dana Stalder Contributor Dana Stalder is a partner at Matrix Partners. The former commercial chief (Product, Sales and Marketing) at PayPal, he now leads fintech investing at Matrix Partners, where he also invests in consumer marketplaces and enterprise software. More posts by this contributor Fintechs could see $100 billion of liquidity in 2021 2019 saw a stampede of fintech unicorns Sunday was a big day in fintech: Afterpay has agreed to merge with Square. This agreement sets two of the most admired financial technology companies in recent history on a…