What is the all time high daily VOLUME ?
That depends on whether you want to include China or not. That's going to ruin any statistician's day.
You mean you don't trust that there were
BTC19.8MM traded on whoboi in one week when there are only
BTC15MM in existence and most of them didn't even move?
Edit oh and
BTC17.3MM were traded on OKCoin that same week. So
BTC37.1MM just between two Chinese exchanges in one week

you and I could take 1 single satoshi and then execute a special trading protocol to trade it back and forth 120 trillion times per second.
makes for quite the daily volume...
EDIT: if you know that some fees have to be payed, it's different. But in the end the exchange can always fake it or have 0-fee bots doing trades.