There has been a lot of accusations form banks, that bitcoin is perfect for money laundering and is used for supporting crime.
Banks aren't making these accusations. Politicians and governments are. There's a big difference.
Banks are in business to make money. Bitcoin can make them a lot of money. They're not going to try to bring it down, they want to participate and make a ton of money.
This the politicians we should worry about. They don't have real understanding of what Bitcoin is or why it improves a failed system. A system, by the way, that politicians (over history) have created and continue to support. If politicians deem Bitcoin as a threat they will enforce laws to make it difficult for people to use it.
As the base of voters we can combat that worry by voting in politicians that are supportive of Bitcoin and the market it strives to create.