The government won't entirely disappear any time soon. You'll wish they would. In Rome it got so bad that the people just abandoned their land because the government was so oppressive. Later there was no government in Rome and only cows grazing in the city. But first the totalitarianism.
This is actually happening here, in Greece right now too! History tends to repeat itself so that it reminds the ones who didn't notice (or didn't study enough) what needs to be done. For some peculiar reason I tend to believe that this time will be different though. Technology is a catalyst. Whereas human greed always intervened to the current economic system, math came along to resolve this with a blockchain ledger to witness it all.
That's why I don't believe in a total catastrophe. I (as you've mentioned in a previous post of yours) believe that the solution is always somewhere in the middle, rendering a "gray" shade to the black or white decisions we make as species. Now, there are voices that oppose to the scenario of a "digital" non-inflatable economy. I don't. I believe that if we want a decent world to live in, we certainly need a decent monetary system to run it.