I've seen btc go from $1000 to below $500 and then go very close to $18k before going down to sub $10k before this so I'm not even surprised anymore. Though if you use those milestones as indicator then we could be seeing $20k very soon.
I doubt that, the popularity of BTC really increased in 2020 and still increasing in this year as pandemic has not yet subsided. What I mean is that, the milestone might be a good reference, but if you are seeing that way, you might also consider other factors such as popularity of it.
I'm still really seeing this through until it reaches maybe 50k then sell. And might then see if it goes up or down without any regret in my side