Why not sell the old one – unless it is a commuter that you are also using for your main bike.
What benefits has the new bike got – will you use it more and therefore be fitter and therefore be a better and more reliable breadwinner, and possibly less likely to succumb to the daily grind and even suffer from depression.
Is it just a play thing – but will mean that you will socialize with other riders more, and therefore be happier generally and less likely to succumb to the daily grind and even suffer from depression, and will therefore be a better and more reliable breadwinner.
Cyclists (at least the ones that get fit because of it) live on average 10 years longer, and the fitness benefits means you are less likely to become ill, and will therefore be a better and more reliable breadwinner and are likely to be around longer for your kids.
Compare it to the gym memberships that a lot of people (inc my wife) have and never use.