Then they'd be competing with other company's money and govt's money. Like Linden dollars was already doing in 2007 (pre-bitcoin era) and IRS had to step in to

Then they'd be competing with other company's money and govt's money. Like Linden dollars was already doing in 2007 (pre-bitcoin era) and IRS had to step in to make the tax obligations clear on the Second Life economy. Since bitcoin, if you look at all the ICOs on the Ethereum platform then technically all these companies ARE issuing their currency (i.e. tokens).