All these trades incur fees. Why would someone pay those fees without getting anything useful in exchange? I took the numbers from coinmarketcap, which lists t

All these trades incur fees. Why would someone pay those fees without getting anything useful in exchange? I took the numbers from coinmarketcap, which lists the flow within exchanges actually, which are off chain. I am sure the numbers for on chain transactions can also be found. Edit: the chart with the daily on-chain transferred bitcoins https://blockchain.info/charts/output-volume https://blockchain.info/charts/output-volume