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.
The DCA strategy is used to accumulate bitcoin, not to deposit bitcoin in the non-custodial bitcoin wallet. After getting a good non-custodial bitcoin wallet, you need to protect your wallet's private key or seed phrase from people and back it up in two different locations that only you know. If someone gets hold of your wallet private key or seed phrase, he or she can initiate a transaction and move your bitcoin to a another non-custodial bitcoin wallet.