After the euphoria people felt when Bitcoin was rapidly approaching the $5000 mark started to die down, Bitcoin reversed into a short term pullback (see my previous idea as to why it had to be expected). This correction was rather mild and overdue.
Now we are seeing a possible end of the pullback with a bounce around the ~$4450 support level. See the Uptrend Line and the Fibonacci level for as to why this might be the end of the free fall. The Stoch RSI confirms a possible reversal - it shows that Bitcoin is oversold on the 1h chart.
From here I expect another rise to eventually retest the ~$5000 resistance level.
Conclusion: Bitcoin probably finished its correction (for now) - a bounce is very likely.