Bill Gates casts doubt on Elon Musk's Hyperloop system

Count Bill Gates as part of the growing camp of Hyperloop skeptics. Billionaire tech mogul Elon Musk has gotten closer to making his radical, pod-based transportation system a reality. But the Microsoft co-founder has cast some doubt on whether or not Hyperloop, which promises to ferry passengers hundreds of miles in a matter of minutes, will actually work. 'I am not sure the Hyperloop concept makes sense,' Gates said Tuesday during a question and answer session on Reddit. 'Making it safe is hard,' he added.