DCA method is an investment method through which you can buy Bitcoin at any time at any price. DCA method never helps you to hold your holdings long-term. Holding it long-term depends entirely on you.
Yes long term holding requires long term planning. There are many people who bought bitcoins using DCA method but could not hold them for a long time, it is seen that many panic and sell them. DCA strategy is the way to slowly accumulate bitcoins and DCA strategy is the way to buy bitcoins at an average price. So long term planning is required to hold long term investment, no one can succeed without planning. Before doing any work we need to plan, if you can't hold long term then investing in Bitcoin is not for you, because short term investment can lead to loss instead of profit.
DCA strategy is a popular strategy. This strategy is for those who are new or who want to invest for the long term. Investing in this method keeps you safe from the volatility of the Bitcoin market. By adopting this method, you can invest a certain amount in Bitcoin regularly. This method helps you invest safely regardless of the market price.
Of course, it is advisable to have a plan before making a long-term investment. If you do not plan properly, your long-term investment will not be able to perform. And short-term investment will not give you good returns, because Bitcoin is a long-term investment method. So I agree with you that long-term investment requires proper planning.