There are so many people, especially in America that speak Spanish. It's one of the languages most widely spoken and it would always be an asset to know this language. A lot of jobs are looking for people who are fluent. Also, if you are fluent and wanted to make some money on the side, you could easily get certified as a translator and do odd jobs every here and there. I have a friend fluent in both English and Spanish and can make a lot of money from doing only a few jobs a month.