From 2013 to 2014, American startup Theranos was all the rage. The company attempted to revolutionize the health tech industry by developing small automated devices that can carry out blood tests to detect diseases, like cancers and heart problems, with only a drop of blood. By 2015, founder Elizabeth Holmes was named by Forbes as the youngest and wealthiest self-made female billionaire in America on the basis of a US$9 billion valuation of her company.