For those who argue that Bitcoin and other cryptocurrencies are the next big things, buying and investing in Bitcoin might just pay off. Bitcoin might excel if currencies like the dollar et al trips under a hyperinflation scenario but that for now is not visibly an option that is available, thus, another fundamental question is wether Bitcoin can replace normal currencies and that again is not feasible in the nearest future. Why then should people invest in or buy a currency that can rise or fall by 20 percent in an hour or two?
...Actually, Bitcoin is already a big thing as digital currency and it is the best concept as electronic money. It has its own usage and advantage for online transactions, that's why there's a lot of investors or bitcoin users are interested to invest it. I think it's not impossible that crypto currency will replace traditional money, if the whole world will become a crypto world.