OTH, they can do some interesting OTC trades between BIG holders of different assets. And that's exactly what they do when they do want to diversify.
I don't think so. If somebody owned say, CAT the construction equipment company, just vast amounts of physical hardware, buildings, and equipment, the last thing they're going to want for all those real world goods is...some imaginary tokens. Maybe they can trade 200,000 imaginary bitcoins for some imaginary Wall Street company like Facebook, though.