Backlink blog content not related to niche

Hello, I have some web 2.0 sites and each of them has something about 10-15 articles. My money site is not content related to my blogs at all, but what if I will make an content related to my money site articles on my blogs with a backlink. It will be bad for a rankings? Or the whole blogs with all articles must be content related to my money site?

make backlink that's not the problem with web 2.0 but content should be unique with the quality buddy ....

I think right now, it's not such an issue—but if you're making consideration for future Google algorithms I'd def. try and use topically-relative content. That being said, Google's topical associations are pretty broad, so it's not too hard to develop a believable overlap in content. I usually use a lot of "news" type sites just to keep stuff believably broad anyway. Something with a Health section, Tech section, and Lifestyle section will cover a LOT of possibilities.

Not really an issues. If possible make a few posts on the Web 2.0's to try and make them thematically linked.

It will be good to blast my web2.0s with GSA? Can it negatively act on my money site? Also thanks for your answers!