Bitcoin doesn't need to be pegged to anything to be used in the "real world." It is intrinsically tied to the real world via the energy needed to find a block.

Quit trying to "fix Bitcoin" by saying it needs to be something other than what it is. It is perfectly scarce digital money, which turns out to be a better ledger system than any physical money ever was. That is true not only for digital application, but for "real world" application, too. No need to compromise its supply cap by pegging it to anything else.