Characteristic of corruptors is trying to save money as safe as possible, before they save in foreign banks or do money laundering. but I'm not sure the corruptors want to save money to bitcoin because they understand there's a risk if the bitcoin price drops.
I'm very sure that corrupt people are going to begin to use bitcoin in order to store their ill gains, think about it no on can take your bitcoin if they do not have your private key, they can hide their dirty money and no one will be able to ever get it.