There are over 30 million BTC addresses with a balance. So if everyone used "online wallets", they'd either have to be intentionally leaving dust in their excha

There are over 30 million BTC addresses with a balance. So if everyone used "online wallets", they'd either have to be intentionally leaving dust in their exchange wallets, or there is some Superman 3 salami slicing going on and the exchanges have very patiently held off on sweeping up their ill-gotten gains.