Buying and holding Bitcoin for the long term was already proven and tested, and as far as I can see, it is very favorable for rich people, and there are large companies and several businesses. Especially for people who want a big ROI on their capital.
Now if there are ordinary people who are in the middle class who save bitcoin via dca, they will also experience earnings in the end, but it won't give them much profit because they won't be able to handle that much, but they are sure that they will get profit from their holdings.
Yes, you are right, holding Bitcoin in the long term will of course provide profits for those who can run well according to the capital they have and for those who have large capital of course they can buy in large amounts to wait until the profits arrive, but for those who Collecting Bitcoin using the DCA method of course depends on how much they can collect and whether they can collect it and will be able to get a profit according to what they collect.