Great, now post the total customers' balance info, otherwise the above amounts are useless for determining solvency.
What kind of trolling effort is this? Do you need a hand doing your own blockchain research? Hold my pocket if you want me to walk you through it.
Yes, we can find Poloniex addresses with thousands of bitcoins in them, but the we don't know how much customers have on the site so we can't determine whether or not they are solvent.