The crucial thing is that as you get near this "event horizon" you get close to a point where cryptocurrencies would be macroeconomically destabilizing in the s

The crucial thing is that as you get near this "event horizon" you get close to a point where cryptocurrencies would be macroeconomically destabilizing in the same way gold tied currencies were destabilizing in 1929. I don't think crypto-currencies will ever get that popular though. It would require governments to be on board and foolishly march towards the 1929 thing again. But you never know, as they say, history rhymes.