Quoting myself from another thread....  given a bit of data, I think 12x average utilization is probably a very good target for a maximum utilization.  It seems to work for VISA (most of the time, at any rate).  That would put us at 3600KB blocks for now, and if there's a "phase shift" where utilization suddenly goes up by a factor of 100, we'd be able to adapt within a couple of weeks, meaning before the opportunity is completely gone.

The actors on the stage of the drama formed by the actions that determine the trends in the value of a national currency are themselves players in a game and they can be rationally viewed as such. The theme of "rational expectations" naturally enters. Those who ARE NOT in control but who ARE naturally concerned with the expectations for the value trend of a national currency cannot be wisely assumed to be entirely naive and unable to form "rational expectations" regarding the currency. So the (possibly) "Keynesian" players in this game have natural opponents (or co-players, beyond zero-sum perspectives) who are interested in not being themselves "outsmarted" by those who control the options that determine, say, the quantity supplied of the national currency.