Like many powerful currencies in the past, USD may fall to ground too, my question is will that effect BTC value? Or is it independent of all other real world or non digital currencies of the world?
I believe that bitcoin does not depend on the price of the dollar. In other words, the dollar cannot affect bitcoin. We certainly trade in this currency pair and understand that everyone is guided by the dollar as an international asset. However, this is only an indirect understanding of this dependence.
Price of Bitcoin was affected by demand-supply in the market, when people getting buy more BTC in the market price going rising, so i agree with you even if USD or Euro or GBP price maybe may fall, but it will not impact much for BTC supply / demand anyways.