It sure seems like it's coming. As to your question, that's really tough to say, isn't it? Given their decentralized nature, yet all the hacks and general instability. Another question may be, would the government try to impose a mandatory state cryptocurrency, or something else, which everyone must use? Scary times, some might even say Mark of the Beast type stuff.

As to cryptocurrencies: if Bitcoin, for example, were distributed widely enough, and was adopted enough as a payment option... and the web was still up and running, it might become a good alternative currency to use. If/when that day comes, it will probably not be the time for masses of people to HODL hoards of BTC, as you'd want more coins circulating in the economy.

Actually, one of the companies we've been doing some work for was offering blockchain-based tokens pegged to the gold spot price, tokenized assets may be something interesting to take a look at for this discussion.

Thanks for posting the question,
The Cyberius team.