Have a "safe" travel to Brazil

I am brazilian, living in São Paulo.
I consider São Paulo as a an unsafe city (Rio de Janeiro is worse) but I had have been stolen robbed just only two times. This is almost nothing, believe me.
On the first time, actually, I hadn't been stolen robbed by a armed guy but, it was a guy who passed running close to me, toke took my cap and escaped. I was 10 years old.
On the second time I was sleeping (I was 13 years old) when the burglars invaded my parents house.
Even though I think I’m very lucky guy. I could be even worse.

So I’ll give you a tip that can avoid bad things when you will be visiting Brazil, more especially São Paulo:
"Be prepared and / or looks poorer than the person beside you".
Burglars are people who, any another people, calculate their gains versus their risks. So, if it is more difficult to steal rob you than another guy close to you and your belongings has lowest lower value than the belongings of this guy, problably you are you are probably safe.
For example: On the subway don’t use your cell phone if there is not another guy with using using his too. Even though then be sure you are far from the doors.
On the strests don’t expose your camera too long.
Try to walk in group and even though watch out.
When you were in crowded places put your bag in front of your body.

Following this concept you will enjoy a lot your trip to Brazil.

Obs. In Rio de Janeiro this rule don’t work so well. There is so many large-scale beach plunder and we never know.
In Rio I would just keep the money of day with me, this is the money I eventually can lose.