Classic retracement from first attempt to break $20,000. We already saw this before in other round numbers, happens sometime. Dip followed with nonsensical CME shorts FUD will be followed by a new ATH in a couple of days. Buy the dip or cry later, be warned.
Same sort of thing with with bitcoin when it was about to hit $10k. People got worried on the first attempt seeing that it didnt' go past $10k probably as a result of either market manipulation with people shorting bitcoin en masse or just profit takers who don't believe in bitcoin climbing much higher.
Exact same scenario. Look at the charts and compare. And what happened with bitcoin after it hit $10k on the second attempt? $10k -> $13k back to $11k and then to $17k and now we are close to $20k.
Same situation here. We could be staring at price close to $30k after $20k is broken the second or even third time around.