i think if USD fall, it will make price of bitcoin increase. but Bitcoin does not seem like the thing that people will want. maybe at that moment, Many people will buy gold, silver, jewels. that's what i think it will happen if USD fall.
Falling the USD and increase the bitcoin price and its value even it bitcoin's demand decrease but falling the USD can manage its price.We should expect decreasing of USD which can help us to earn more profit.