Reread the thread: They force us by expecting us to pay capital gains taxes on every media of exchange thats not government currency.
Why is that a problem? If bitcoin value increases compared to local fiat it's good for the merchant. They will pay capital gains which are ONLY a fraction of such gain. If they lose value or stay the same, no problem.
That guy seems to be impossible to explain this. His argument is now reduced to the assertion that Bitcoin will fail because of paperwork businesses would have to fill out for exchange rate gains. I hope somebody would come here and explain it in detail whether it actually requires that much work and how often
Personally, I don't believe him but have no experience in this field to refute with competence...