Studies show that growing up bilingual helps with brain development. So yes, no question about it. Unlikely in my situation, but it wouldn't hurt.
You need to make sure that you actually do it properly, half assing that can hurt children's development. Also, speech impediments may be more difficult to treat, I'm told. Better to focus on one way to use your mouth instead of emphasizing bad habits. So, it has dangers, but when done right, it's bloody awesome.
Btw, I know this from first hand, my brother grew up bilingually (in a half assed way kinda) and had a shitton of problems, not speaking either language as well as I could when I grew up with just one language.