Government action around the world has had a definite impact on cryptocurrency pricing, both positive and negative. The idea that a government cannot control cryptocurrencies is ludicrous, because they can simply ban them if they feel the need to.
If any real cryptocurrency actually manages to catch on for normal payments, I'd expect the government to force businesses accepting it to only accept transactions from "validated" wallets to ensure that the proper amount of tax is being paid. Any "unvalidated" wallets would risk a visit from the local tax agency for attempted tax fraud or whatever. Technology won't stop legislation.
Also, if anything is inflated right now, it's the price of cryptocurrencies. They're volatile to a comical level and the ones that are reasonably stable have such high processing fees that they're utterly useless for actual payment. The solution proposed by enthusiasts seems to be centralization (Lightning network etc.) which ruins most of the theoretical benefits of cryptocurrencies. Nobody with the intention to buy groceries buys any cryptocurrencies, except for the one country where cryptocurrency companies have managed to convince the government that their system is a good solution (and even there the actual currency gets converted to US dollar in the end).
Inflation, artificial or otherwise, is simply something that can happen in a free economy. So is deflation, of course, but deflation tends to be bad for trade, so the world's current attempts to keep everyone rich revolve around artificial infinite inflation. Inflation, as a concept, isn't necessarily a problem; every currency on earth has suffered through it at some point. It's more of a consequence and a goal of economic policy than a disease to civilization. It's true, many collapses of civilizations have coincided with inflation events, but the economy is bound to collapse when a civilization collapses.
Turkey actually willingly let its currency deflate, with terrible results for the general population as prices for common items skyrocketed. Risking arbitrary spikes and dips in value isn't much better than the current system, in my opinion.