Some of my comments from the last week and a half about what Bitcoin is good for:
https://news.ycombinator.com/item?id=30469595 when your country's central bank suspends electronic cash transfers, suspends the foreign exchange market, limits cash withdrawals, and prohibits the issuance of foreign currency from retail bank accounts; or when you want to fund a militia in a war zone
https://news.ycombinator.com/item?id=30435990 when your bank account gets frozen because your family member supported a political protest in Canada
https://news.ycombinator.com/item?id=30446703 in case the government of the current global hegemon imposes economic sanctions against your company or your country; right now that's the US, but probably ten years from now it will be the People's Republic of China
https://news.ycombinator.com/item?id=30408611 as an alternative to a bank when "whistleblowers" send the bank history of 30,000 "legitimate clients who had done nothing wrong" to journalists so they can comb through them looking for something to pin on the accountholders
https://news.ycombinator.com/item?id=30375671 when five Canadian banks mysteriously have an hours-long outage at the same time
I also wrote a bit last year about my observations of how Bitcoin gets used in practice today, outside the world of hoity-toity speculative finance the Harpers article is about: https://news.ycombinator.com/item?id=27448744
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† Or preventing it from being moved without its owner's consent, which is the value proposition both of safe deposit boxes and the Bitcoin guarantee of a limited money supply.