The Ravens of the Tower of London
In case you guys are not aware of it, the Tower of London has this legend saying that when the resident ravens of the tower leave the kingdom will fall. So since the middle ages there are always at least six ravens in the tower with staff to look after them. I believe currently there are seven of them, the required six plus one for spare, just to be on the safe side.
In the digital ages the Tower should create 6 digital raven assets and run a full node in the Tower protecting the kingdom against the (financial or digital) fall. I would feel more safer that way.