Yes. Inflation and deflation of the prices is controlled by the governmental bodies. This is not dependent only on the cryptocurrencies. Various financial activities that are taking place at the national and the international level determine the prices in a specific country. Moreover the economic growth is much relatable to the development in different spheres.
Not to mention that manipulating national currencies (eg. by printing money) is often done by purpose, to make own companies with their products cheaper than of its foreign competition. This is how China for years had been working as a factory for the world.
Each state is trying to help its producers by taking various tricks, whether it is a deliberate depreciation of the national currency, taxation of imports with various duties, and much more.
Its just that some states use legal methods, while others may cheat.
Its more of currency manipulation is the right term I suppose, Its not purely or 100% controlled by the government but of course significant contribution coming from them. By taking fiscal and monetary policies specifically these will undertaken by the central banks.
I hate so say that allegations recently by the US against China on its currency manipulations. In my opinion its just a counter moved by China to lessen the effect on the current Trade Wars in which it is initiated by the US.