DeFi projects are already on fire before bitcoin rise up to 10,000$, DeFi projects like COMP and Aave have already surge very high and this i believe is the reason why ethereum left it's 200$ boundary too
Defi has had a positive impact on this market, which makes many people interested and invest in this market. Since then, Bitcoin has pumped up to over $ 11k and also helped ETH grow to $ 340 at the moment, I believe bull run has officially begun.