"When the taxi driver is talking about the stock market, you know it’s time to sell." (Wall Street maxim)
Well, what if they start selling Bitcoin in the supermarket? Seems like a similar signal.
I've never understood the appeal of an unregulated currency mostly used to disguise illegal transactions or as a tool for speculators to fleece the sheep. And it's not just an idle game -- the BBC reports that Bitcoin "mining" uses up about as much electricity as the country of Switzerland, without producing either high quality cheese or chocolate.
The only real use I can see for being able to buy Bitcoin from the Coinstar machine in my local Jewel supermarket is making it easier to ransom back my computer in case I'm hacked.