The March banking crisis made it harder for crypto companies to access conventional banks, erecting an obstacle to a mundane yet vital task for any business: finding a place to park excess cash. This has created a sort of Trojan Horse opportunity for a start-up with a well-known pedigree to bring cash-like instruments to the cryptocurrency space, laying the groundwork for the company’s broader ambition to digitize the conventional bond market. The start-up is PV01, whose name is a piece of bond jargon, and it was co-founded by Max Boonen, who also helped get the giant crypto market maker B2C2 off the ground.