That's a bunch of really strange claims.
> If the government can't grow the economy long term
Governments generally decide policies, and it's private businesses that actually grow the economy. Unless you're talking about socialism, your statement doesn't make sense.
> if you're in a country where there's not even food to buy?
The only country I'm aware with real food shortages at the moment is Venezuela, and the situation is entirely created by the socialist idiots in charge. Thankfully most countries are not going that route.
> and hoarded BTC, did the shopkeeper?
Well, they still can. Nobody is stopping them. Cryptocurrencies are just starting, in my opinion.
> having 10 years of BTC saved up is going to do much
It will do much. They would have more money saved. Which they can use to get out of a shitty country, for example.
> if you didn't have enough to leave maybe you're even worse off when the power goes out and the mobile networks start flaking and you don't even have loose leaf
Maybe. But then your credit/debit cards or ATMs won't work either. Are you advocating holding your money in paper dollars with that argument?
Some cryptocurrencies work over SMS, which doesn't require a data network.
> Inflationary currency is designed to "lose value" as the entire country "gains value", hard to call it "losing money" at that point.
That statement doesn't make any sense. If you made $100, and saved it 100 years ago, it's worth only $3 now. You would be losing money by not investing it. And not necessarily in cryptocurrencies, you can invest into ETF or mutual funds or stocks - almost anything is better than a traditional currency.