Bitcoin isn't fungible because its blockchain is public. Companies like Chainalysis trace transaction histories, link addresses to real identities (via CEX), and flag βtaintedβ coins from crimes. This makes some BTC less acceptable.
Monero is fungible. It hides senders, receivers and amounts by default (using ring signatures, stealth addresses, etc.), so no history can be traced. One XMR always equals another.
Whats the total supply?
18.4M
How can i check?
Every full node does all the time.
You can perform logical and mathematical operations on things even not knowing said things, as long as certain equations hold.
Im running my own monero node. Where does it say?
I don't remember what command it is right offhand, but I know there is a command you can run and specify Block 0 to the current block, and it will tell you exactly how many Monero have been minted since then.
In monerod, the total supply scan was accessed using the print_coinbase_tx_sum command, if I recall correctly.
I just link you another message of mine, where I explain the supply/inflation of Monero:
