There is no doubt that the best investment in bitcoin is the long term and I'd always recommend to try doing that since it's promising in terms of profit.
For me this long term investment is best as well. But this really varies from person to person. This never let you know that everyone is interested in long term investment and everyone must be going for that. No, every trader comes with some different mindset and achievements that may or may not be resonating with long term investment. So better is to research before getting in here.