It's true that the DCA method is very profitable so you can own bitcoin gradually. Even though the profits will not be too big compared to buying when the price is cheap, at least you can still make a profit if you hold Bitcoin for a very long period of time.
Yes, it is true that dollar cost averaging is a very simple investment method.We all need to have a specific goal to invest in. As long as we are able to reach that specific goal, we should continue to invest. Just like when we invest in bitcoins we need to start investing with a specific goal in mind we need to plan in advance how many years we will be able to continue our investment. Since you are talking about dollar cost averaging method of investing, you can start your investment with any amount whether it is 50 dollars or 100 dollars or 150 dollars.
Whenever we start investing in this method we need to plan for long term so that we can maintain this investment method for long time.If one starts his investment with 50 dollars initially then he may be able to increase the amount of money in his investment later if he has financial solvency.