Traditional finance has kept cryptocurrencies at arm's length, but many investors and bankers are positive about the future for the distributed ledger technology or blockchain that underlies them.Billionaire investor Warren Buffett has warned that cryptocurrencies are set to have a bad ending and he would not bet any money on them.Several online e-commerce sites, blogging service WordPress, tech giants such as Microsoft and Dell, digital gift card platform Gyft have added bitcoin as a payment option for many of their services. Bitcoin cards sold by different services can be redeemed for real cash and some providers also have bitcoin payment cards that can be used as debit cards. There are some physical stores in the U.S. and Europe that accept bitcoins for payments. Investment funds and exchange traded funds focused on bitcoins and blockchain are also prevalent. Bitcoin ATMs have also sprung up across the world, mostly in North America, that allows exchange of bitcoins and cash. And bitcoin are sometimes a cheaper means of fund transfer due to low transaction fees.