DCA is good way of buying bitcoin notwithstanding whether you are new or old, whether you have money in large amount or I'm low amount. The advantage of it is that, it will reduce losses that may arise when the market fall when you have bought your bitcoin, it saves you from buying bitcoin all and then later observe that the market hs gone down below where you bought when you can actually buy more cheaper at lower price.
As far as I know about DCA method, DCA strategy prevents you from making high profit and high loss. That means DCA strategy will not allow you to make excessive profits and will protect you from excessive losses. For example, if you buy four weeks at $60, $65, $70, and $75 principal, your purchase price under the DCA method would be $67.50. Now even if you sell at $70 you won't make a loss, whereas you had to buy at $75. That is, DCA method prevents you from high profits but protects you from losses.