It is so vague to determine that btc or usd is better. So what is your purpose? If it's all about exchanging deals, then everyone will choose USD, on the contrary, people choose btc as a highly profitable speculation product. But saying that does not mean that the dollar cannot invest, the foreign exchange market is also one of the global investment whirlwinds now, but it needs a large amount of capital because the fluctuation is not so much as crypto market.
People should stop comparing bitcoin to USD, as fiat and crypto are different.
USD is the most dominant currency int he world, while BTC is only dominant in the crypto space, which crypto space is just very small compared to the coverage of USD which all countries recognize it as a currency and that's how powerful USD is.