It depends on what you mean by "it." The is that lightning networks are "off-chain" transactions that aren't validated by block miners unless/until they need t

It depends on what you mean by "it." The is that lightning networks are "off-chain" transactions that aren't validated by block miners unless/until they need to be. The idea is that off-chain transactions can be free and instant. The problem is that those speedy transactions only work for transactions within the lightning network. Anything cross-networks needs to hit the block chain. This introduces a new centralizing dynamic and it is hard to predict what sort of issues or complications may arise from this solution in practice.