It depends on your investment plan, if your idea is profit without setting a cap for gains, it means that you may lose because of greed. "20,000 is not enough. I want to wait until I reach 100,000 ".
Cash out process depends on your country and the amount of data "Docs/ID" you are willing to provide, getting cash "anonymously" becoming more difficult with a small amount of money and vice versa.
The best way is trading platforms due to lack of opportunities to  scam "if you deal with a reliable platform."