Did not get the main idea for many months. Then cam a big crash at the end of 2017 and I thought it was just a big scam and someone made a lot of money. The years passed and I heard and read about btc again. I was like, what the hell it is still existing ? I invested first where I made money but still did not really understand. Later on by patient studying I got the point. Since then I did not traded, jut hodl.