Bitcoin has fallen to its lowest value in six months, bottoming out at $33,046 on Monday morning, before rebounding slightly to over $36,000 by mid-afternoon. For six out of the last seven days, the leading cryptocurrency has declined in value, bringing its total market cap to a little over half of its historic high last November. The drastic sell-off indicates a pivot from an economic atmosphere driven by greed to one driven by fear, as investors tremble in the face of various economic, geopolitical, and technical factors that make cryptocurrencies seem particularly risky for investors. Markets across the board have taken a hit in response to Russia’s actions on the border of Ukraine, causing investors to shed perceived risk assets in fear of an escalation of the Eastern European tensions. After NATO announced that it would reinforce its Eastern borders, European markets fell by almost 4 percent, dragging cryptocurrencies along with …