You should show that you have a job, a bank account with accessible funds, other assets that can be liquidated, a rich uncle ... Essentially what do you have that you can support yourself with. You may wish to consult with an experienced immigration attorney to assist.
The answer provided here is general in nature and does not take into account other factors that may need to be reviewed for a more precise answer. You should consult with an immigration attorney before taking any action. The answer here is not intended to create an attorney-client relationship.