Which method you will invest in is entirely up to you. Whether you will adopt the lump sum investment method or buy DIP or you will adopt the DCA method is entirely up to you. What is meant by Bitcoin lump sum is an investment method, it is not something of Bitcoin. You can buy Bitcoin through lump sum method.
DCA is an investment method, it is a very simple and very good investment method among all investment methods. You cannot reduce your risk by investing through the DCA method. By adopting the DCA method, you can buy at any price at any time. Continue to buy continuously by adopting the DCA method and hold Bitcoin for a long time
Yes, you have complete freedom to decide your investment strategy. But is it the right move for a new investor to adopt DIP and lump sum investment strategy? I doubt that a new investor will be able to survive in the long run by adopting DIP strategy and lump sum investment strategy.
I would never advise a new investor to invest in DIP strategy, even in lump sum investment strategy. The main reason for this is the possibility of not being able to keep calm during a market decline due to delay in investment. You have to wait to enter the market at a certain price which only wastes your time and delays in entering the investment. Even for a new investor, it is normal to panic during market volatility, especially when he has invested a lot of money.
Therefore, DCA strategy is the best for a new investor. To start investing in DCA strategy, you don't need deep knowledge, you don't have to wait for a specific period of time, you don't need a lot of money, the possibility of panicking due to small investments is very low and the DCA strategy reduces market volatility to some extent. Even as your portfolio grows larger, you will become an experienced investor where there is no possibility of panicking due to market volatility, because you will already be familiar with the market.