The economic impact of Covid has weakened global markets, including the slow movement of the world economy, maybe this is what makes the USD dollar even more sluggish. but in bitcoin I see the price is still strengthening now $ 15000 dollars stronger than last month.
I think you mean 1500 and not 15000 right. The dollar was firming on the back of Covid problems, not the other way around. Investors were flocking to the safety of the US dollar during times of financial stress.
Now we see the unwinding of that and the dollar goes back down again.