Bitcoin's creator made a wise choice for supply-audit design through immutable public ledger over 100% privacy at the expense of exploitable inflation bug. You can't have it all; there are trade-offs. Bitcoin can add privacy layers but it is integral that it maintains its supply-audit-design as its core design element. We know that privacy coins can't deliver the same supply-audit characteristics as the public ledger information is obscured and this opens up supply side risk arrays.