You sir clearly don't understand what Bitcoin is. You are correct about the dollar but bitcoin doesn't need to be backed by anything, it just needs to be adopted. And a currency that is decentalized, borderless, and a peer to peer payment system well you can be sure that will get adopted quick.
It could be that OP think that bitcoin's price was being manipulated by dollars, that is why he came up that he doesn't like bitcoin. OP was just confused about bitcoin and its functions as a digital currency, we can't put the blame on them because the Government never stops creating false statement about bitcoin, and the recent bitcoin ETF was rejected again. We are all having a hard time predicting what is going to happen to us if this bearish market continue, it is worth holding bitcoin or not anymore.