With Bitcoin dropping below US$30.000 for the first time since last year, MicroStrategy could be at a "make or break point".If Bitcoin drops below $21.000, chances are MicroStrategy will face a margin call.MicroStrategy's average price per Bitcoin is US$30.700 in Q1, almost breaking even.Despite the given risks, the company still owns about 129.218 Bitcoins, worth more than US$4.06BN.MicroStrategy's market capitalization is US$2.61BN compared to US$4.06BN in BTC on its balance sheet, making it viable as a leveraged play.