I'm confused as to how Bryce has the coin held hostage if he only has 1 of the keys of a 3 out of four multi-sig wallet.

It seems like it's time to use the three available keys to move the foundations coins back into staking so the network will at least move. Isn't a moving network needed in order for people to prove what share of coins they hold for an exchange anyways? Not sure about signed message, but certainly sending a small amount of coins would need a network that actually solves blocks.