i don't like to read too much into these metrics---same with total number of addresses or total number of blockchain.info wallets. these stats can be easily gamed. we can't actually tell how many "people" control those addresses. if one bitcoin whale were so inclined, he could make himself look like many thousands of "bitcoinaires". just sayin!
He never said it's people. Title says 744060 addresses. OP, do you own one address from the list?
People who mined/bought bitcoin at the very beginning moment are now holding a huge amount. It would better to have a rich list.
Edit- Here's the rich list-
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html