What does theft have to do with cybercrime

nothing ...

Actually, theft is the act of taking something that does not belong to you. Cybercrime happens online virtually. Although cyber criminals might not be stealing physical objects, they are often involved in virtual forms of theft. Identity theft is one good example. If someone steals your identity they can easily steal other things from you as well, including money from your bank account. They didn't go to the bank with a gun and take physical money, but with a computer they can easily transfer your money into another account that they control.