Odds are that you’ve been hearing more and more about cryptocurrency as digital tokens like bitcoin and ethereum have become valuable commodities. Converts (and investors) say that cryptocurrencies built on blockchain technology represent the future of money, finance, and commerce.

But skeptics say that digital currencies represent crowd-sourced pyramid schemes or are fuel for another tech bubble. We met with Olaf Carlson-Wee, who was the first employee at the cryptocurrency broker Coinbase, where he famously took his entire salary in bitcoin. Now, Carlson-Wee runs a hedge fund that deals exclusively in crypto-assets. We talked with Carlson-Wee in San Francisco about money, trust, and how he made his friends rich.