Yes, Café Bustelo Coffee can be used to make regular coffee.
While it is typically known for having a strong, espresso-style flavor, it can certainly be brewed using standard coffee-making methods, such as a drip coffee maker, a French press, or even a pour-over.
However, Café Bustelo Coffee is usually more finely ground, which is ideal for espresso. When using it in a regular coffee maker, you might want to adjust the amount you use to suit your taste preference, as its fine grind and robust flavor can result in a very strong cup of coffee.