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.
I agree bitcoin does not need support from the institution or anything. Many people adopt and trust bitcoin because the payment system is very safe, easy and capable of acting as a global currency.
Without institution money we will know grow, currently we are in the stage of development now and soon the market will be regulation.
Trump just announce that he does not like Bitcoin and crypto, that's a good sign that the market is growing, and because we are getting their attention that means they are monitoring the crypto space and I expect soon there will be a fair regulation for the good of the market.