If you probably start thinking about how long you may need to DCA to be able to accumulate a lot of Bitcoin it may become discouraging to you. Rather than thinking of that I think you should just focus on enjoying the process of accumulation until it becomes used to you that you no longer consider as a sacrifice but a way of life. When you start thinking of your strategy to DCA into Bitcoin as an investment into your future for a better life especially during the time when you can no longer work for money you can become motivated to keep doing so. And as an investor I think you should focus more on the positives of your actions to keep you going.