This chapter offers an introductory perspective on finance, tailored specifically for readers with a background in Physics. Our aim is to present financial concepts from the ground up, assuming no prior familiarity with the subject, while encouraging the critical thinking expected of a scientific audience. It should be noted that relatively few treatments of the nature of money adopt the perspective of a physicist, and the perspective presented here may diverge from that of economists or other scholars. Readers are therefore encouraged to approach the material critically, recognizing that certain claims about the foundations of monetary theory may carry a speculative character. We invite the reader to question, reinterpret, and reformulate these ideas within a logical framework consistent with their scientific reasoning.