5. Bitcoin Trading: There is lot of potential to make money on trading in Bitcoin, but it takes a level of expertise and knowledge about the bitcoin market.
6. Bitcoin Investment : If you can be patient then you can make a lot of profit through the investment of Bitcoin. When the price of bitcoin goes down, you can buy and hold bitcoin and if you have enough patience time then after you will earn extra bitcoin profit.
the two methods that you mentioned between points 5 and 6 certainly require initial capital that we must spend and cannot be obtained free of charge. I'm sure most people do it this way to be able to benefit from it