You will find different perspectives on this case from different scholars, one scholar has the opinion forex is haram because speculative, but another opinion forex is allowed when traders really understand how to work use technical and fundamental and not blindly predict. However, all decisions back to yours, if you think forex is haram, just leave it, but if you think forex gives you something useful in life, you can continue in the business, just simple, we have own responsibility whatever done on the world later in judgment days.