There are many bald assertions in the article and it comes clearly in response to the growing prominence of BRICS. So to me it reads as somewhat fearful. I don't think trading in BRICS is inherently "betting against the dollar" but it's abundantly clear that dollar hegemony is over. We are well on our way to a world of multi-currency trading. If BRICS nations do establish a new reserve currency that will change a lot. It's even been suggested that "the unit" may be a gold-backed currency. That I might see as a bet against the dollar.