Don't visit unknown websites, and especially music, video, or pornography sites because they are often loaded with malware. (slaw.ca)
Although it can be good to avoid downloading apps from unknown websites it is still safe to do so from the brokers official websites. (thetradepros.com)
I refuse to use my VISA card, as my account contains all of my money, and by providing this unknown website with my card details, I'm entirely at their mercy. (money.stackexchange.com)