Starting with the amount you can afford to lose is a good started point as many people that are new in trading don't always consider that before start investing. It is a risk and speculative market and that means if you don't actually know how to analyze it using technical and fundamental indicators you may lose all your capital if you put in. Your knowledge of how the market work is far better than the amount of capital you have to invest. Bitcoin on it own has given good return in millions of dollars to those that have a deeper knowledge on how it works and we also have many stories of those that have lost heavily through investing in Bitcoin.