Powerledger

There are lots of ways to deal with this. State channels for scaling or other techniques to reduce the bandwidth.

As good as a seastead sounds, the idea that anyone is cashing out here is lunacy. Blockchain is not a 'wank word', blockchain is a very real technology that removes the need for an intermediary to verify transactions - simply put, blockchain reduces costs associated with networking and markets and that is why it is perfect for energy trading.

JB- Is your question - how do you prevent a smartcontract from being hacked?

JB - Yes just as an ERC20 token

Yes nodes will include application hosts