can i travel to USA if i got only 1000 buck in my bank?

travel for one week

How much money you have in the bank is not the issue. Which country would you be traveling from? It is very difficult to get a Visa to travel to the US unless you are a citizen of one of the countries that has a reciprocity agreement with the U.S. (European countries, Australia, New Zealand, etc.).

It depends on where you are coming from. If your journey expenses take a large part of your money your stay will be very limited.

That amount of money is scarcely more than you need just to cover the hotel stay (depending on city). You stilll need money for transportation once you get here and for food. That really does not seem like enough, unless you are staying with someone who already lives here.