First of all title of your topic is misleading ad it says Bitcoin is dangerous for economy and later you says banks intervention is dangerous so they are contradictory to each other.Some banks are providing crypto related services to clients such as buying and selling Bitcoin on your behalf but that's do not harm your economy but this also doesn't implies that bank will provide your safety of the funds.They will just take comission for providing services and use your funds to make transactions so it's better to have control of your Wallets in your hands and trade them efficiently.Banks should only allow to process your crypto transaction from your account.But there is nothing that will harm the economy as many major banks are doing this so they will not take any decision against their country.This is source of revenue for them.
Dude just opened up few topics about how bitcoin is not good and it is unhealthy and that's it, just a hater and that's all there is to it. Of course bitcoin is not dangerous and of course it doesn't hurt the economy at all, why would it? People like OP just like to stir up some stuff so they could get attention and nothing more.
Open up his account and check his messages and you will see what type of a person he is, there are tons of those type of people around and it will continue to be around for a long time. I am not saying that he is a bad person, I am sure he actually believes in the things he says and he is trying to help the world and not just be a hating troll, but fortunately for us he is wrong and just annoying. Bitcoin is the best invention since sliced bread and it will continue to be like this for a long time as well, it will breach higher and higher prices over course of years.