Plus he clearly is attempting to sell his accounts, so I don't see any reason why he can't effectively sell one or two of his accounts to the lender in exchange for the loan to be considered "satisfied"
Actually, I am not interested in that proposition.
Too much of a hassle to sell the accounts and recover my bitcoins.
Well the problem is that if you claim that he defaulted then he will get negative trust and will have more difficulty repaying you. If you don't claim he defaulted then he could potentially simply continue delaying to repay you eventually leaving you with nothing. If you take an account that you can later sell then you would have a greater chance of recovering your money. It isn't the best situation however it is much better then you potentially receiving nothing.