What if I want to buy a cheese sandwich today with BTC?
A cheese sandwich can remain the same fixed price in dollars for years, with only the relatively slow change in actual value due to inflation.
I’ve seen BTC swing 10% in 24 hours. Does the cheese-sandwich-maker have to look up the rate this instant and calculate a spot price for me?
Will they have more or less dollars at the end of the day, when they need to pay their bills and buy more cheese from their suppliers?
“Just buy cheese from someone who takes BTC”, doesn’t help, it just kicks the can further down the road.
“Just add a bit of a buffer in the price to take fluctuations into account”, means that I go buy a cheese sandwich with dollars from next door because it’s 50 cents cheaper for the same thing.
As an investment vehicle, BTC is doing hot laps of the track, but until its volatility issues are sorted and it becomes “boring”, it’s not going anywhere as an actual currency.
They could have hooked the phone up to a windscreen wiper motor (a high torque motor with a crank arm) and left it to run for a few hours, that would have given them about 10,000 open/close cycles. But no, it’s “let’s hang a 5kg weight off it and use the phone as a bit of a hammer”.