With the limitation of 7 transactions/second, 10 minute confirmation times, hour long deposits, and sometimes, transactions that take days, there is a big incentive to create ways to transact off the chain. With inputs.io and soon Open Transactions, it seems there has already been some movement in this direction.

It has been claimed that the block size limit will be increased sometime in the future. But there is already movement to get around the block chain altogether. If a new method of securing transactions can be instant, then the block chain becomes less attractive.

So if enough transactions go off chain, will there still be enough incentive to mine and secure the block chain? or will it lead to fewer transaction fees, fewer miners, less security......

And if the answer is no, that wouldn't happen, I'd be interested in hearing some thought on why, and what would happen if the answer were yes.