Two more bitcoin exchanges were robbed in the past few days. "Flexcoin" lost all online coins and shut its doors. Flexcoin admitted it did not have resources to cover 896 stolen bitcoins, worth £365,000 (about $608,200). Bitcoins in Flexcoin's "cold storage" (offline), for which depositors have to pay a fee, were not affected. "Poloniex", the other hacked bitcoin site, admitted that it is missing 12.3% of its assets because of a flaw in its transaction system. Its owner apologized and will keep its exchange running. The Guardian reports Bitcoin Bank Flexcoin Closes After Hack Attack. Flexcoin has been forced to...