Unless an investor considers himself an expert (based on experience) in Bitcoin investment and if he has enough funds to invest that is when he can be able to use several strategies to invest in Bitcoin. A beginner in Bitcoin investment will only destroy his investment if he cannot maintain consistency in one strategy.
An investor who have met several cycles of Bitcoin might know how to make good use of several strategies to have a good Bitcoin portfolio. Using several strategies can help perform better based on several market conditions instead of relying on one strategy that works sometimes and other times it dont work.
What will you define as an enough fund ?? It's just like saying accumulating a lot of funds to take on different strategies, is it? ..
BTW that's not my focus, my point is that your post might divert the attention of newbies to other strategies, not bad actually if they know about them but they should know that the best strategy for now is just buying to increase their portfolio and the advisable strategy of buying is DCA[they will have different price entries with this & might enhance there portfolio size within a short range with consistency].