By Akin Oyedele at Business Insider
Bitcoin can be a legitimate and widespread form of money but mostly in theory, for now, according to Goldman Sachs strategists.
That's because the key functions of money that bitcoin can serve are already well handled across much of the developed world. Many countries had stable currencies and inflation rates before bitcoin came along. The dollar is the standard for international trade, and for foreign-exchange reserves. Investors wanting to diversify their portfolios could use precious metals like gold.