Monero doesn't have a supply that's auditable. AND since there aren't may people using it, the anon set is tiny.
Discussion
How big do you think your anon set is on Bitcoin? It's not every Bitcoiner. It's only as large as your coinjoin peers. And only a tiny fraction of Bitcoiners coinjoin much less every transaction.
Every Monero transactions is a "coinjoin". And Monero stealth address receiver anon set is literally EVERY MONERO USER THAT HAS EVER EXISTED.
You are the one with the tiny anon set.