Not if you're in a relationship.
Chaturbate is another one of those "free" webcam sites that make money from users paying tokens to optionally "tip" other users while they perform sex acts and stream them live for the internet.
Whether it's safe or not really depends on what you consider to be "dangerous"...
If you're worried about web security and viruses, then Chaturbate is a recognized site, so no more harmful than logging into most websites these days. In fact, in the world of sex websites, Chaturbate might actually be safer in that regard.
As for whether it is harmful to use a website like this... Well it's the whole debate about whether enjoying adult material online is safe or not.
Millions of people use sites like Chaturbate, so it certainly won't kill you.. But I'm guessing if you're in a relationship, then there will be certain partners that wouldn't be pleased to see sites like Chaturbate in the browsing history!
A email-spamming website. It's not a safe site.