For example, say someone borrowed from Patrick to invest in Pirate. They may now be slow on interest payments or even making interest payments fully to Patrick out of banked Pirate profits. But that loan will probably go bad unless the debtor opts to pay the principle out of their personal funds. So Patrick may be thinking "I have X bitcoins out there in loans that are current and so will pay on schedule", but he may never see the principle back on those loans.
Things may be much worse than Patrick thinks they are, even if he is 100% completely honest. (Though naive, it's not like lots of people didn't tell him this would happen.)
Isn't most coin lend out at 10% a week? I don't see why someone would borrow from patrick to invest in pirate and get -3% a week profit. Now if it's like hashkings situation where he took insured funds and invested them in pirate for a 6% profit then yes. I think just too many people got spooked and pulled out, now things are gridlocked. At least in patricks situation, unless he wasn't being honest.