yes one of the main reason could be because bitcoin is a decentralized currency , which means that not a single person or goverment can control it, this means that if the goverment cant control it, then the goverment wont deal with it since it gives them no benefit and It is very hard to regulate. Bitcoin would encourage more money laundering due to the anonymity it pvideros. Regular people still don't understand Bitcoin and think of it as some kind of scam.