Do not be too sad due to scam coins. Cheer up, in it lies a learning curve that if taken very well can make people better.
In fact, due to their exploits and mischief, the crypto community is coming together to defraud and unmask these so called scammers at first sight.
Besides, it is not only it the world of cryptocurrency that scammers exist, it is prevalent all over the world as history stretched and will always be part of any economy, so to say.
Perhaps it would be a good thing to inform others how to detect scam coins, projects, ICO, etc instead of sitting on one corner and letting the gloom catch up on you.