Recent $1k+ retracement is normal and very healthy – but it would have been unhealthy if it didn’t happen.
Retracements (blue arrows) at breaching $4k, $5k, $6k & $7k were of the order $500 and all made higher lows. $6k was the exception which sailed through with barely a flicker.
Now that the BTC price has more doubled from the Dec 2018 low, $1k or more...