Pretty sure he means any features of a desired chain can be had with a side chain, but BTC is the common denominator, no special token.
So if there's demand people will peg in BTC, vs generating fake demand with a fake token.
Discussion
Totally get that he wants features like zcash, zkproofs and mimble wimble
But from what I heard the drivechains can introduce oracle issues to L1 (don’t shoot the messenger)