Hi Raphael and welcome to the forum.

I don't work in the finance sector, but I'm sure many here will agree with me on this much... Please don't relocate to Switzerland before securing work. This really isn't the kind of place you can move to 'on spec', and you would need to prove to immigration that you have at least CHF 30,000 p.a. to support yourself. The cost of living is higher than most (if not all) areas of London, and whilst the wages may appear attractive, it should really be a move motivated by having something great to put on your CV.

I admire your ambition, but the route has to be paved with caution and security. The best that you can do at this early stage of your career is to send your CV to the recruitment agents in your field and see if you get any feedback.

Good luck!