Bitcoin investors voiced anger Wednesday after the first creditors meeting for failed Tokyo trading exchange MtGox, whose spectacular collapse hammered the digital currencys reputation and left a trail of unanswered questions. They are very careful about giving out any information at this stage, it seems, Kim Nilsson, 32, a Tokyo-based information technology engineer, told AFP after the meeting. Kolin Burges, a 40-year-old investor from London, lashed out what he called a lack of transparency over the missing money. People who attended the meeting said former MtGox chief Mark Karpeles and a court-appointed lawyer managing the firms bankruptcy proceedings gave no clear answer about what happened to their money.