Forex is a tough game for sure no doubt,it's not impossible though to make a lot of money,even on the most basic platforms with a reasonable size account,experience and proper money management.
I think Kieran hit the nail right on the head. Just like to add, the 98% of people failing Apple1 talks about (some say its 90%, other say its 80%, who really knows) come in the market thinking they can get rich quick, be a millionaire in a year.
So lets say you are an experienced trader, and lets say your trading strategy you a consistent average yearly (modest) return of 15% for the sake of this exercise. And lets assume you are disciplined enough not to take any money out of the account. And lets assume you saved up enough money to open a $10 000 account.
If you then trade for 40 years based on the above criteria your account will be more or less at $2,678,635.46 after 40 years. So yes, you CAN get rich, not impossible, but in reality things don't work like that. People are emotional beasts. We are greedy and wish to get rich quicker so we can spend our millions.
Manual traders battle with emotions. Algorithmic traders battle with markets changing over time, and this causes a trading strategy to lose it effectiveness over long periods of time.
'Can forex trading make you rich ?'... tough questions this, but NOT impossible.
Good luck trading out there!
Keep it simple, be disciplined, get rich slowly and above all protect your equity!