Billionaires worldwide are fearful at the moment. They can only be rescued from the sinking ship by Bitcoin lifeboats. The whole population is being saturated, including people who have never touched a drop of water in their lives.
They become billionaire for nothing, so for sure they already have a lot of back up plans with regards to their assets and investments. Maybe some of them have diversified and include bitcoin already together with some oil, gold and other assets. So I don't think they are going to be afraid and fearful at the moment. On the contrary they might have taken advantage of some situations around to go and multiple their money again. Russian Oligarchs though are different cases.