1. We were surprised how our competitors imploded so soon (maybe not direct competitors, but similar "returns/yield" products like BlockFi)
  2. Building on Bitcoin is hard.
  3. How many unexplored things there are for Bitcoin financial tools. It's surprising how many things have not been built out yet. For example,
  • there's still not an open market for futures or options worldwide for DLCs yet
  • escrow contracts
  • covenants