This all looks and sounds really great but I have one big question. If this requires a proof of work chain, why not just build it on top of Bitcoin? Then you w

This all looks and sounds really great but I have one big question. If this requires a proof of work chain, why not just build it on top of Bitcoin? Then you wouldn't have to convince people to spin up a new node for a separate chain. This seems like an obvious choice to take advantage of Bitcoin's network effects and inherent chain security. You could even lock up some bitcoin and issue bitcoin-backed Handshake tokens and continue operations as normal.