I agree with all the comments here. The point is that we think long-term. If you believe in bitcoin long-term, it doesnt matter if you buy today and drops more. However, I think they are speaking to traders. If you are looking for short-term profits, it doesnt make sense to buy now if you think it is going to go down.
Yes it really doesn't matter whether there are numerous pump and dumps if you are investing for a long term and current price doesn't matter, but most of the users in this forums are either traders or signature campaign hunters so it really matters for them.
For the ordinary holders like me, I think the bitcoin price is good to buy for the long term.