You can spend USD anywhere.
Its fast and free to transact. Bitcoin is slow and expensive.
USD is stable. Bitcoin is so unstable that Steam wont use it anymore.
USD has a democratically elected government which regulates it. Bitcoin is governed undemocratically by miners who only seek profits.
you don't need miners polluting the planed to keep USD secure.
USD is pegged to the US economy. Bitcoin is pegged to nothing except its speculative value.
Bitcoin exchanges are constantly hacked and private keys are lost. Banks are insured against theft.
Bitcoin is uninsured and unregulated. There is no consumer protection so no refunds.
God bless America!