right,well Mt gox was a disaster but keep in mind like what is happening now in China with authoreties being on exchangers behind to make sure they are playing fair and that will make people more confident in Bitcoin. As for a fork well ETH did well so it should not be a problem for bitcoin
ETH is a sideshow, the plaything of a bunch of traders and miners. it wouldn't be anywhere without bitcoin. everything crypto hangs on bitcoin's trust and strength. a fork would undermine that massively.