But if somehow the US defaults, how would the crypto market react? Positively or negatively? The USD is the reserve currency of the world, so it's likely everything (stocks, crypto, etc) will crash alongside it.
So, as you said, stock, fiat, and any pair with USD will crash also. And we know crypto in all exchanges is a lot paired with USD, especially USDT. I am pretty sure it will be affected. But, like many posts above, it's not long, it's the same as the correction market. If this continues, people will leave USD and continue to another stable fiat like Euro, Pound, and Yen. Or maybe get an experiment back to Gold.
But, I am not worried so much, US Dollar is used in many countries for international trade. This means the US government can resolve the debt by printing the dollars. before doing that, they have to save the budget, they should not be involved in war anymore, don't send war guns, and not interfere in another conflicting country.
And I hope the US government did not sell the
205,515 Bitcoin held. If they sell Bitcoin to pay debts, the crash will happen for a long.