54000 addresses currently holding a balance. Also note, the top address belongs to BTC38, of whom we hardly ever see, meaning 35.5% is held by *different* people.
How much does it cost to create a new address and send funds to it?
Thats right, its basically free.
There is no way for us to verify that different people hold that unless you want to get 54,000 'people' to sign a message confirming their address/es?