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."
Human needs are very well insatiable. If bitcoin should reach $100,000 today some people would still wait till when it will reach $200,000 despite the fact that the $100,000 is what they have been aiming at since years got into bitcoin in the first place. How to cash out to me is one of the simplest to do and agree depending on your country. There are several options available there is direct sales to individual, there are exchange sites that pay directly into banks, there are also peer to peer sites, you can even use it to buy goods among other means. Just choose one that best suit your needs without raising unnecessary eye brow with the government or any of its agencies.