Lol! You might have a bike, and you might have a wallet, but I guarantee you don’t have money in it.
Compared to running a car, cycling as a passtime is an extremely cheap means of travel.
Everything about owning a bike or in my case an E-bike is, or can be amazingly cheap. From initial purchase to the low maintenance costs to transporting your bike on PT...all amazingly cheap and not just because I'm a senior either.
And then there's the additional benefit of maintaining a level of physical fitness our car bound friends will unlikely ever have.