I think he's talking about Bitcoin because a Republican contestant, DeSantis, is building his campaign largely on being pro-Bitcoin. Making Bitcoin tax-exempt from capital gains is a great promise, but backing the USD with Bitcoin sounds a bit crazy to me, but he says he would start at 1% (and not all of that is even going to Bitcoin), with annual increases, so it's more of a wordplay than anything serious.
He is a joke. And no he is not a serious contender lol. He's a loon. Guy is a complete joke and conspiracy theorist, the type of person that is normally a Republican, but for some reason he claims to be a Democrat haha. Probably most of whatever small amount of support he has is from Republicans who like him cuz he's a crazy conspiracy theorist and that's what they're into.
Add to that the fact that he for some reason claimed to not own any Bitcoin and then it came out recently that he does own Bitcoin. Like, why even lie about that?! He says he supports Bitcoin but lies about not having any. Soooo weird and suspect.
Anyway, I think backing the US Dollar with Bitcoin is a pretty stupid idea. USD is fiat, and the whole system is based on fiat. Makes much more sense to just adopt Bitcoin broadly as an alternative than try to back the dollar with it. Also a partially-backed dollar is meaningless. Something is either backed or not backed, partially backed is not backed. Maybe in the future if fiat currencies collapse it would make sense to make a new currency backed by Bitcoin, but to back an existing fiat currency with bitcoin doesn't make sense.
Makes much more sense for the US govt to start using Bitcoin as part of their reserves the same way they hold Gold reserves, not tied to the fiat currency. Buy up like $10 billion of Bitcoin to hold as a reserve. In addition to that treat Bitcoin as money from a legal standpoint so it isn't taxed (or at very least make a tax exemption for smaller bitcoin payments to cover everyday spending), make a sensible regulatory framework around the industry instead of just letting the SEC wildly attack the industry, promote Bitcoin education so that there is less disinformation about Bitcoin among the population, promote merchant adoption of Bitcoin, and involve Bitcoin mining in energy infrastructure projects and so that it becomes standard procedure for miners to be placed at power plants to help with energy industry issues. All that makes a hell of a lot more sense the idea of backing the USD with BTC coming from a loony third rate conspiracy theorist politician.