You need to be licensed and approved by most authorities around in Europe in order to manage and maintain a
crypto exchange! So you need to have a license or be registered as financial service provider / entity if you want just a slight change to get a
bank account in the very limited banks around for your crypto business.
This leads me back to how mcuh money you have. As you may know a
Swiss bank will don't even bring you a cup of coffee if you go in there and tell them to open an account for you but you don't have any money or you have safed up a few thousand euro during your live time. The same goes for many other banks.
This is the financial world and they will see the money! If you can't show them the money they will kick you out and even send you a bill for the cookie and coffee you got under the meeting where they laughed the entire time.
So back to the fact. If you have small budget you want to setup "something" in Belize,
Seychelles, St. Kitts or Puerto Rico! Forget about banking, you will be depending on some sort of
EMI to help you with that part or you will need to make up a cover business which most often anyway will decline your project. Now a days banks want to see a real business with live people and live office. So unless you plan to move your live to some of the mentioned offshore jurisdictions this is going to be terrible hard.
I hope it gives you a better picture of the situation. If you want to play with the big guys you have to move like them otherwise you are out of business before you got started.