Everyone in here is desperate to convince each other the Bitcoin can only go up and therefore you have to buy and hold.
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.
For me Maybe those people traders or these people have some financial needs that they sell their bitcoin for fiat money. There are a lot of reasons why they do this but if you don't have any nice reason and important reason for selling, just hold it and wait.