Now imagine a world where bitcoin is world 1st monetary unit (e.g. like dollar is today) and someday it will get into “maintenance mode” for a day, two or month. Will world halt for that time?
With far more serious bitcoin deflationary problem this would be the least of our problems.
As far as I understand, this is a planned soft-fork of the blockchain BIP 148 scheduled for August 1, to activate segwit (BIP 141). Segwit (“segregated witness”) is meant to help bitcoin scale.
EDIT: Nice background article here: https://bitcoinmagazine.com/articles/bip-148-and-bip-149-two-uasfs-activate-segwit/