because DCA is slow in building your portfolio faster. If you lump sum, buy at the dip and keep your regular DCA ongoing while you use the other strategies once in a while when you can, you will definitely reach your bitcoin target faster than only using DCA method.
I strongly believe that this is dependent on the amount of money you are using to do your dca. If you are using a reasonable amount of money to do your dca, you are going to get to your bitcoin target as fast as you want. If you have the resources, you can dca twice or more weekly or monthly and your portfolio will still move as fast as you want it. All you have to do is just to increase your dca amount and reduce your buying intervals.
Yes the amount we use in accumulating and the rate we are buying will determine how fast we can get to overaccumulation stage but it is not necessary for us to rush our investment especially if we can not control everything. You can have the money to double your holding but the question is do you have the capacity to control everything properly because if you don't take your time you will definitely run into problem. It is better to invest slow and steady and get to your desire point than to double your investment and later run into challenge because it will be a waste of time and resources. the reason why some people get into trouble is because of rushing to get to the peak of their investment and sometimes, some folks take it as a competition.