As far as I know and I am very sure of, bitcoin scams, is also crypto currency scams, this scammers target just about any crypto community that they see that the coin or token of that community is doing well, their target is usually not centered on bitcoin alone
So, personally, I would say that, referring to bitcoin scams as the highest in the crypto currency industry is kind of wrong, scammers will take just about any crypto currency from anyone if such a person let them.
And talking about exchanges, there are actually a lot of trustworthy exchanges around, atleast the lots I've personally used myself, and this not to say that scam exchanges don't exist, they do, but they are not popular as the legit ones.
So, to avoid being a victim of scam to any fraudulent exchange, avoid using exchanges that are not well known and lack reputation in the industry.