Autumn Radtke

Autumn Radtke, the 28-year-old CEO of an upstart bitcoin exchange, died last week under mysterious circumstances at her home in Singapore.

The U.S.-born head of First Meta was found dead by police on Feb. 28, with the cause of death yet to be determined. In a statement on its website, First Meta said the company "was shocked and saddened by the tragic loss of our friend and CEO Autumn Radtke."