The key for Lisk is to move to the next level is to deliver at least one killer app. Ethereum already has it in form ICOs. The other key is Lisk needs to deliver is getting developer community backing the platform. If they can get traction in these 2 areas, They can make many people rich.

Sources : https://blog.sipacoin.com/lisk-vs-ethereum/
https://ethereum.stackexchange.com/questions/2104/how-does-lisk-differ-from-ethereum