autumnradtkePolice are investigating the death of the 28-year-old American boss of a Bitcoin exchange found dead at the base of a Singapore apartment block. They say Autumn Radtke’s death – the latest misfortune linked with the troubled virtual currency – appears “unnatural”. Police in the city state do not expect foul play. The term “unnatural death” is used to refer to suspected suicides and other deaths not due to natural causes like an illness. Radtke, chief executive of Singapore-based First Meta, was found dead on February 26. A local technology website initially reported that she may have committed suicide, but later updated its report to say it was “unclear” how she died. MORE