However sellers are a it more at ease because if they bought at lower, they are going to miss out from profit but they still profited a bit to say the least. So, it is quite understandable why bitcoin didn't went up just yet but it is on the path, it will go up. There is no situation where bitcoin went to $19.4k levels and didn't break over $20k because we are too close to give up right now.
It's expected as bitcoin approach the ATH, too many people want to sell at that point, so it makes sense to sell-off before bitcoin reaches that target, then buyback at the dip, waiting for the next leap.
So, this is normal in the market of free trade, everyone has a target, has a plan, just hold it or sell at the moment, if the price holds its position above $16k and be able to bounce back to $19k, many people will regret their decision to sell at current price and vice versa.