Have my COE , what are the chances of student visa being denied? Using 401k for finances

I applied to a language school, I am suppose to be leaving in April, I have to first do my visa application at the embassy in Miami. I am only using my 401k as proof of funds and it wont be available until I quit my job. I was just wondering will this be a problem? The school that gave me the COE told me that there are low chances that my visa will get rejected