Yes it can, because all the transactions of bitcoin are anonymous and the corrupt people needs such type of platform to save their black money and to transfer them anywhere without taxes and without government consideration. Everything can be use either in positive of negative way, this is the negative use of bitcoin to do corruption.
I think there's no need to cover up on this, bitcoin is famous all over the world and bitcoin is well known on the black market that bitcoin is a good currency for illegal activities and without you knowing already many people are using bitcoin for illegal transactions, it might also be corruption
Maybe before bitcoin is widely known for illegal activities but now that legitimate companies are already accepting bitcoin, I think that would change the way people view bitcoin. We cannot deny that bitcoin can also be used for illegal transactions but it's the job of the authorities to stop those who are doing illegal activities. More progress will come and the good ones will remain in the minds of the people.