In recent weeks, the price of Bitcoin appears to have been driven by one main factor, namely the weakening of the US dollar. This correlation is evident when comparing the US dollar index against Bitcoin.
Correlation is not causation.
We can look at this from another perspective. Pull up a chart of the NASDAQ index, XAUUSD (gold), and BTC. They are all strongly correlated since March, all in strong bull trends, and have broken above their yearly highs. In fact this correlation goes far beyond these three assets; risk assets are in bull markets almost across the board. And there is a good explanation for that: $6 trillion pumped into the economy through Fed QE and stimulus.
The DXY does historically have some negative correlation with stocks and gold. However, I think the current DXY weakness is rather due to the magnitude of the US's economic contraction and its poor response to COVID-19 pandemic, relative to other currencies in the basket. I don't think this has much effect (if any) on BTC.