Gypsies ? ?

Europe here we come! We've never been but have always wanted to go so my husband and I are getting ready to head to spain, France and Italy. As I am getting ready...planning, organizing, etc...I read all about the Gypsies that pick your pockets and whatever...they skilled..you almost don't even know that they are there. Like a scene from a movie, slip their hands in and take whatever they can.

So, in light of this information I am on the hunt for the right kind of shoulder bag or purse to take with me. A backpack type is just asking for trouble. The regular purse type I would have to set down all the time...for lunch or to take a picture, etc...so I think the best option is some kind of over the shoulder type bag that can be infront of me (to one side) and always on me...but I just can't seem to find the right one.

Am I over thinking this ? ?
What about my computer (if I take it) at the hotel? Asking for trouble?
Where do I keep my passport? On me ....like glued to my body?

I hope the hotel has a safe but is that really "safe" .... oh my ....I'm driving my self crazy!
I've never thought along these lines before when I've traveled....at least not to this extent...what are your thoughts?

Over thinking it?
Playing it safe?
hmmmm.......