According to Cointelegraph, recently, bitcoin technology pioneer Adam Back said at the Transylvanian cryptocurrency conference that the sidechain construction scheme has been proposed for five years. In the long run, the bitcoin sidechain will weaken the altcoin. Influence. Sidechains can bring the function of altcoin to Bitcoin, but the economic incentives (because the sidechain does not have new crypto assets) reduce the incentive to develop such systems. But Adam Back believes that his ideas apply not only to sidechains, but also to every second-tier solution built on top of Bitcoin, such as lightning networks.