Solving the scalability problem and moving to proof-of-stake requires some faith in Vitalik, but that's only if you care about the value of ether, Ethereum's currency. I hold ether, but if Ethereum fails to solve these problems, someone else will solve them and I will be glad.
Personally, I have no desire to replace capitalism or democracy. But they are clearly broken. I intend to fix them, and I hope the decentralization community gains enough developers, designers, and economists to make it happen. We need your help.