Public consensus is not what provides the fungibility. The algorithm provides the fungibility. Cryptocurrencies is all about faith in the algorithm, not the people.
Good luck in selling that idea to the general public.
You can't have faith in an algo if you can't verify its actions.
You can verify everything you DASHTARD. I can even prove i send amount XY to account ZZ.
That is called cryptography, also u can count every fucking monero coin created in every fucking coinbase transaction.
If you don´t believe in nor understand the tiniest bits of cryptography GET THE FUCK OUT OF
CRYPTOCURRENCIES.