I worked at a "Financial spread/CFD" company for a while and two things were made very clear when I joined:
1, 95% of people lose money or break even
2, Try to avoid using the word betting in relation to financial spreads as it sends the wrong (but actually right) impression
Yeah, there's a reason that IG and their Cypriot ilk can offer tax-free spread betting... their products are regulated as gambling contracts not investment contracts.
The margin call is the petit mort of our financial system