SBR – Bitcoin sportsbook Bitbook.biz has announced that it is closing. SBR last reported on February 27 that Bitbook.biz was suffering from continued DDoS attacks. Bitbook.biz released a statement on their webpage today informing users of the closure and that bets are no longer being accepted. Bitbook claims it will be paying all users. Bitbook.biz lists a 48-hour time-frame for these final payouts. SBR advises players to request their balances ASAP. Bitbook.biz website statement: “Important Announcement We have decided to shut down BitBook.biz. Although BitBook is shutting down, we are not running off with user funds. We ask that users…