But you don't have all your assets delivered in cash. That's just something you do when you suddenly need a pile of cash. Most other means of transferring/del

But you don't have all your assets delivered in cash. That's just something you do when you suddenly need a pile of cash. Most other means of transferring/delivering assets come with costs - costs which depend upon the urgency, the physical security, etc. Someone storing 1bn offshore doesn't bring it all home via such a service.