Actually if you put funds in a trust if you can establish that none of the assets in trust were the result of any illegal activity I dont think they could take it, and to add I think a lot of the time the people who administer a trust fund investigate where the money came from before the trust is fully activated. So if you can prove that every cent in trust was earned legally I dont see how it cann be seizedTrust will do nothing for you if your found guilty, will just take them more time to seize it at first, and they will get around it.
Your best bet is to have it in cash, off site, with someone you trust or underground, don't have any assets fully paid off (even that isn't in concrete)