The Buying and Selling Trick

Juliana saw this promotion ad, giving bonus for depositing and trading crypto-currency, she thought that by depositing money, she is actually purchasing Ethereum, the truth was that she was just gambling the Ether rates inside a manipulated trading platform. Once the trading platform account manager understood that Juliana wont deposit anymore money, she lost everything that he had on the account.

Please be sure when you are depositing money to an exchange that you will receive the coins to your personal wallet, and no one besides you will have access to trade it. The value of Currencies wont get to Zero, it can go up and down but almost never disappear, while when you gambling on rates in an inner platform you can lose all of your investment.