Service providers (Comcast, Verizon, At&T, etc.).
Are they not the new banks? They provide the means for ALL transaction and generation.
If they wanted, they could identify the BitCoin protocol signature (or BotCoin trading websites), and forbid it on their networks. Or even charge for it. They have complete rights over the network. And because of the overhead of their immense infrastructure, a new company can't just pop in and offer an alternative.