> Doing that in ethereum and all the other similar currencies is as easy as pressing a button. The rollback was (and still is) very controversial. It required

> Doing that in ethereum and all the other similar currencies is as easy as pressing a button. The rollback was (and still is) very controversial. It required the agreement of the large mining pools to support the fork, which they eventually agreed to. It wasn't quite as simple as "pressing a button". Banks get hacked all the time, eat the loss, keep it quiet and move on, e.g. http://www.businessinsider.de/how-to-hack-a-bank-mikko-hypponen-f-secure-mandiant-fireeye-bangladesh-swift-banking-north-korea-2016-6?r=UK&IR=T http://www.businessinsider.de/how-to-hack-a-bank-mikko-hyppo... http://www.dataiq.co.uk/news/20141107/banks-keeping-quite-despite-swathe-customer-data-breaches http://www.dataiq.co.uk/news/20141107/banks-keeping-quite-de...