But when you buy Bitcoin, someone is selling it to you.
Why are people selling Bitcoin?
The knowledgeable people are the ones who are now slowly selling out before the bubble bursts. When you are now buying more and more Bitcoin ("investing" as people in here call it) who do you think you are buying them from?
You are buying from the knowledgeable people who are slowly getting rid of their Bitcoin.
of course selling, because some peoples need money. maybe they already hold for a long term.
and now, it is time to sell the coins to earn more money because holding for long.