Just for a better and more accurate headline, this is what he actually said: "My plan would be to start very, very small, perhaps 1% of issued T-bills would be backed by hard currency, by gold, silver platinum or bitcoin".
Great news nonetheless, but it's probably getting overblown.
Any news on Bitcoin always gets hype and if a presidential candidate is constantly discussing Bitcoin then it will get overblown. As of now, he is just a candidate, who wants to win the election, and therefore such statements are coming out of his mind. In all cases, if he wins, I doubt he will ever implement what he planned and what he has spoken in the past about Bitcoin.