When making any sort of transaction crypto or otherwise it is important to look into the service you're using prior to making any sort of transaction. Taking the time into doing a little research into the exchange you're planning on using to make your purchase is never a bad idea as not every exchange is good and some might even be of the scam nature. Being cautious pays off in avoiding bad situations such as being a victim of a shady exchange that turns out to be a scam. So be careful.