Sometimes you can be lured by sweet words and might fall into others trap. As a newbie here you are motivated to try trading for the first time and then decided to buy and sell to earn a little profit. Check on those cheap decentralized exchange and then buy the coin you want to buy and sell, and the suddenly you can’t sell it on legitimate exchange. The last thing you know is, it’s a wrong coin but with the same name but with different contract address.