Sadly that won't solve the problem. If 99% of Bitcoin is locked up in sidechains, the free 1% will become the new Bitcoin, so each Bitcoin will be far more expe

Sadly that won't solve the problem. If 99% of Bitcoin is locked up in sidechains, the free 1% will become the new Bitcoin, so each Bitcoin will be far more expensive. As long as the price of Bitcoin rises faster than the mining rewards reduce, people will keep mining it. And if you think that people dump a coin just because all the use cases have moved onto new coins, I present for your comment the "Ethereum Classic".