the comparison to any utility spending technology is complete nonsense - you simply do not substitute value for a slightly better technology, imagine what level of stress it would be to change the way we exchange value every 2-3 years 
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.True but I'm not sure how quickly that level of standard gets adopted in the first place. Are we into the TCP era yet or are we back in the Appletalk/netbios frames/ipx/etc. era still?
Whatever crypto really makes it big (and it may well not be Bitcoin or Monero) will likely be dominant for decades if not longer.