DIP and DCA are two investment methods. There is no such thing as a quick success from investing by investing through DIP and DCA. I think DCA method is the best for investment. If a person of yours buys using the DCA method, he can buy at almost all levels at its price. Investment is long-term, such as 8 to 10 years. What do you mean by quick success? Investment is a long-term process, such as selling after a few days, and then making some money, which is not called investment, this is trading. There are many risks in trading, you can lose all your money and you can lose all your money. But the risk is much lower in long-term investment.
You can quickly accumulate the amount of Bitcoin you want in your portfolio by buying through DCA and DIP, but this does not mean that you will become successful very quickly. The Bitcoin market is very volatile, no one can say when it will happen. You can never say whether you have succeeded or failed until your time limit is up.
Everything has a risk and the level of risk will be proportional to the potential profit that will be obtained so when someone has to trade so that assets increase from the trading profits they make, there is nothing wrong, regarding the risk I think it is quite worth it with the profits obtained because there is nothing profitable without risk and someone who does that must be ready for everything including being ready with the knowledge they have and having confidence in the trades they make.
The DCA method is indeed quite good for future investments, we will continue to add assets to the portfolio regardless of the price of Bitcoin at that time but it is only within the limits of our ability without being able to increase rapidly.
So for someone who has long-term investments with the DCA method or trades to add assets to the portfolio I think both are good, depending on the trading knowledge we have.