So...here I am, asking for guidance...
As know and i am also a trader in my experience there nothing scamm in trading i am not sure if they have scammers in trading because trading is buy and sell altcoins.
To avoid this scenario do not use unreputable exchange, there so many trusted exchange have an give high security to the users investment.
What about the startups emitting new crypto-currencies? Does that mean that we cannot use them? I mean, I intend on participating in a crowdfunding for a new digital currency by a new company which is just starting to build its reputation.
To tell the truth, I think that trying to avoid scams can be a double-edge sword for people wanting to invest in virtual currencies...