summary...
seems someone wants to go pos so they can have their cake and eat it
in the end pos advocates end up revealing their motives are about wanting rewards without any costs
using boring arguments which "economically" is empty of validity
p.s its obvious when the title is "economical" not "security" as its bases for prefering pos
exactly!
this is the only reason every other altcoin that has PoS algorithm chose it in first place and is the only reason why some of the other coins are going that way. if you look at each of them, they have big owners that have a large "stake" in that coin. for example XRP is 100% premined and controlled by their creators. ETH has 72 million premine and is controlled by their owners. they all want more power and control with their free "stakes" + the easy money they earn just by having that amount.
now they are pushing the same thing for bitcoin because they have some coins and want free profit. it will never happen.