Marvel Comics is far from going out of business. They have a strong brand and a diverse range of comic series that continue to attract readers. Also, their collaborations with other media like movies and TV shows keep their popularity high.
Captain Marvel is not male in the comics. The comic version features a female character who goes through various adventures and battles with her distinct abilities.
Definitely not. Captain Marvel is a female. The comic books have consistently presented her as such. Any claims otherwise are incorrect within the traditional comic framework.