Inasmuch as most investors that are financially capable may likely be nterested in buying Bitcoin at once than buying by parts I still believe there is still need to know the best strategies that will be more favourable because if one is equip with the right information it gives more confident and determination to make more significant investment.
DCA strategies is more leverage to accumulate Bitcoin and I think most investor will consider it more preferable.
Buying Bitcoin all at once in large or large amounts is also not a problem for investors or companies who have a lot of money and I have also seen this in several investment companies that are very brave to do this, for example, like Blackrock and Microstrategy today where they very often buy Bitcoin in large quantities and the DCA they do is also in larger amounts rather than in smaller accumulations like investors who only have limited capital. However, what you need to understand here is that a strategy like DCA is not bad at all even though the amount of Bitcoin purchases can still vary greatly for each person because it is also always adjusted to our respective abilities.