Will the president help me financially if I am dying?

No. The president's job is to secure the well-being of all the people in the country, on a macro scale. Since that is a huge job in itself, the president cannot be asked to devote time to any individual human being, no matter what the situation is. Of course, you can always appeal to the president. Write a letter, explain your situation and ask your question. There may be some action, though likely not in person. Letters are screened and sent to sub-offices who reply on the president's behalf, if deemed necessary or useful. You might also try more local organizations who can give you advice on dealing with financial problems.