Now top U.S. crypto investors, including Pantera Capital, Paradigm, Polychain, Coinbase and Dragonfly are lunging at an opportunity for a piece of that market. They’re sinking $28 million into Hong Kong-based crypto trading firm Amber at a $100 million valuation. The firm profited by trading both its own capital and crypto startups’ money. In 2019, Amber made between $10 and $20 million in revenue, with net profit margins north of 50%, Kullander says. He aims to double revenue in 2020.