Yup,bin Laden is a KNOWN terrorist who is supposed to have a personal net worth of 300 MILLION US dollars. Seize and/or freeze all his bank accounts and property worldwide. With modern electronic banking,this shouldn't be any problem at all to accomplish.
Okay hacker dude, lets see you pull it off. The US government has been trying to do this for years. The accounts are not in his name and he doesnt go to the bank and make deposits and withdrawals.