You can deposit bitcoins using DCA method but have you ever thought that you need a strong wallet. Bitcoin storage should never be deposited in a light wallet, because you can never ignore Bitcoin, Bitcoin is a valuable asset. So the best way to save Bitcoin DCA method and even better way is to use strong wallet.
Regarding wallets, it is certain that everyone will choose a good wallet to store valuable assets such as Bitcoin even if that person buys it in installments every week or month. So there really is no need to talk about this anymore, even though it is an important option for beginners or people who don't have the best wallet to store Bitcoin. However, in this forum there is a special sub about discussing wallets which can be educational for everyone who wants to choose the best wallets for their needs in storing Bitcoin. You can find this here:
https://bitcointalk.org/index.php?board=37.0