What every plan should look like for each investor should depend on their goals. However, I consider buying through DCA as the best method for now if the goal is to hold the investment for a longer time. This is because the price will go down and will also go up from time to time, but it mostly goes up in the long run.
The DCA strategy will always be adopted, even if the bitcoin price is above $100k, because not every investor has the available money to accumulate bitcoin. Some investors depend on their monthly salary to accumulate bitcoin, and since bitcoin is a long-term investment, they will not use their entire salary to accumulate bitcoin. The DCA strategy also gives you the free will to buy bitcoin anytime your money is ready, without thinking about whether it is the right time to do so.