How can it be a scam? It may not be a very viable business plan because the stock markets are a zero sum game, for every investor who buys a trade, there has to be an investor selling a trade so someone is always winning and someone is always loosing.. Binary options are just a new age form of derivatives which were impossible before the internet. It is hard to understand how marketsworld.com can expect to stay in business if they make 5% half the time whenever an investor loses a trade, but because they are licensed in the UK, I know that the investors’ funds are sequestered in segregated banks accounts as well as all earnings, so if marketsworld.com goes under, investor earnings are still safe.