Those are some interesting numbers! Also, I bet that we have at least 2-3 million (if not even more) BTC in "lost wallets", where people lost their private keys... And that number can just grow in the future as chances of "finding" the keys are close to zero!
I have picked this post on behalf of the @OurPick project which will be highlighted in the next post!
Yes true I had a feeling that was about the amount lost giving a real max supply of around 18M - and there's not much new BTC being produced now!