51% attack - in Silicon Valley

Silicon Valley 5x08 Promo "Fifty-One Percent" (HD) Season Finale https://goo.gl/UfJCmj

The cryptocurrency attack featured on Silicon Valley is real, but it doesn’t work like that
https://goo.gl/8EMjMv

"But Cornell cryptographer Emin Gün Sirer tells The Verge that 51 percent attacks can’t do quite as much damage as the Silicon Valley episode suggests. While messing with a coin like this might crash it, it wouldn’t allow attackers to “delete all of our users, all of our developer apps” as Dinesh suggests." ~ Cornell cryptographer Emin Gün Sirer