Not explicitly. Currently, it's the most widest used language for interacting with the VM, but it's not the end development goal. I don't think the entire thing

Not explicitly. Currently, it's the most widest used language for interacting with the VM, but it's not the end development goal. I don't think the entire thing hinges on Solidity, though it's probably the most immediately accessible language. The hype driving the price up seems a bit premature, though. There are a couple of other languages in development that might improve the ecosystem: * Vyper https://github.com/ethereum/vyper https://github.com/ethereum/vyper * Serpent https://github.com/ethereum/serpent https://github.com/ethereum/serpent