Yeah, but in how many of those currencies are people actually using base units for transactions? I'd wager they're all trading notes denominated with thousands

Yeah, but in how many of those currencies are people actually using base units for transactions? I'd wager they're all trading notes denominated with thousands or millions of units for a loaf of bread, like the Zimbabwe trillion dollar note, http://news.bbc.co.uk/2/hi/africa/7832601.stm http://news.bbc.co.uk/2/hi/africa/7832601.stm Also, there is already a trick on the lightning network to trade sub satoshis without requiring a hardfork, probabilistic payments, https://courses.csail.mit.edu/6.857/2017/project/7.pdf https://courses.csail.mit.edu/6.857/2017/project/7.pdf