Bitcoin definitely has the potential for corruption. It is hard to trace and with a reliable mixing service you can convert it to fund relatively easily. Its used to buy and sell drugs already, its only a matter of time before you can bribe government officials with it as well.
Anything related to money can be a way for people wanting to corrupt someones money. Limited access to once wallet just like in a bank can be a way for them to think of doing illegal.
Basically anything that can give corrupt people at an advantage will surely be use at their corrupt things. Bitcoin right now is basically being used in money laundering what more it can do to other illegal things. It is a fact that Bitcoin being so secure made it popular to criminals, so popular that it became a main currency in dark web.