Bitt, a Barbados-based blockchain payment startup, has received a $3 million investment from Overstock's Medici Ventures. : Bitt, a Barbados-based blockchain payment startup, has announced a $3 million investment from Overstock's venture capital subsidiary, Medici Ventures. As part of the new deal, Medici Ventures has agreed to buy additional 8.6 percent stake in Bitt, following a previous $4 million invested by the blockchain VC firm in 2016. In a release published today, Bitt said the new fund will help further develop its payments solutions, aimed at bringing financial inclusion for residents in the Caribbean region.