Because it works better and brings profit for most of investors who use DCA strategy. With DCA, it's more easily to succeed and get profit, because it requires simple steps and principles to follow. You don't have to play with technical indicators for any analysis. What you need is researching about fundamentals of Bitcoin, and the rest is going with DCA strategy.
To learn fundamentals of Bitcoin, here
The bullish case for Bitcoin.This is why it's always the best to invest ones own money and the money one can avoid to lose. Although, investing in Bitcoin may guarantee good returns but this may not come in years. This make patience highly important in the space.
You mean you can afford to lose your Bitcoin portfolio? Wow you must have just put a tiny fraction of your money in Bitcoin and just so you answer a Bitcoin investor when you are not really serious with the investment. If I may ask, since you invested only what you can afford to lose into Bitcoin, where did you invest the rest of your money that you cannot afford to lose? I will love to know that investment opportunity you have so much confidence in and believe it can never fail, the reason you chose that over Bitcoin.
I don't believe in investing what I can afford to lose because I cannot afford lose the entire portfolio I spend several months building through the DCA method. Even though I put in small amount of money per time, it is something significant for me that I cannot afford to lose same, the reason I guard it jealously, using a wallet I control my keys. What I only do is to invest amount that I can hold for long without being under pressure to sell. I do this by investing after I have sorted out my basic needs and also set some funds aside for any emergency.