If the America tax reform bill pass, then the price of USD will rise, could it affect the price of bitcoin?
No. There's no changes to how investment assets are treated in the tax code.
The price of USD likely won't be affected by the American tax reform bill.
There's ZERO causal relationship between the America tax bill and the USD value of Bitcoin, I promise you.
However, if rich people have more money lying around because they get to pay less taxes, they could use that money to buy bitcoin...which would help support or increase the price.