No, we are not dead without china. We are growing more strongly. China doesn't control major part of bitcoin. China can influence bitcoin but it doesn't cause much problem.
If China had that much power, either we would have been already dead or become slaves of them. No country has this much power to destroy any other without having a great loss and that is why there is no war happening around. China had a major role in crypto coin's world but it was not everything. It left bitcoin and the currency is still surviving rather making progress with more strength than ever.