That someone failed to make money on the market doesn't necessarily mean they were wrong, it may just mean nobody gave them a pile of money they could afford to risk.
Now we have a bunch of presidential candidates that tell me they are going to print money all day long and a bunch of people who "know better" telling me that won't cause inflation to spike. ¯\_(ツ)_/¯
Also it is my belief that moving money from investment vehicles to consumers will have a inflationary effect on consumer goods. The slow trickle of subsidized Uber rides for example probably has less of an effect than a direct cash transfer that happens more rapidly. More so much of that money is invested internationally, by increasing taxes on the wealthy we may be in effect increasing the total money supply in the United States.