One possibility is to use off-chain transactions between networks of nodes that occasionally settle on the actual blockchain: https://bitcointalk.org/index.php?

One possibility is to use off-chain transactions between networks of nodes that occasionally settle on the actual blockchain: https://bitcointalk.org/index.php?topic=152334.0;all https://bitcointalk.org/index.php?topic=152334.0;all This also has the advantage of instant and micro transactions with minimal fees, while retaining most of the properties of Bitcoin itself (decentralized, trustless, irreversible)