Cash is good to use than bitcoin, but to make money easier with bitcoin and work harder. Inside we can use bitcoin to invest for the future, and can be used for shopping online do not have to go mall, because already delivered our goods.
Cash is still the best direct physical transaction, bitcoin has not been able to beat it in this case, but cash cannot act as a passive investment because its value movements are so slow and we are much more consumptive If using it, these two currencies have the same value, but cash is still the best for now.