soi cau mn 3/7/2021, Washington Post “Wonkblog” writer Matt O´Brian wrote a scathing criticism of Bitcoin in the column on January 14, 2015 that called Bitcoin a Ponzi scheme, implying that venture capitalists who were investing millions in the protocol were merely trying to sell a pipedream to cover their investments. O´Brian suggests that the recent price losses will be the death of Bitcoin, especially in light of the recent two weeks.