They have a 45k BTC volume per 24hs aprox + other currencies
If we get 45k btc divided by 0.25 it's 112 btc maybe a bit less but over 80 btc per day for sure.
they might have around 100 btc per day with all other coin on exchange we cannot know for sure only if we follow every transaction for 24 hour on all coin they just maybe
but even in that case we could not know for sure where is withdraws that need to be counted and that is something that we dont know how much they do