Spending money on a different bike could potentially get you some combination of much lighter weight, a better fold, a more efficient riding position, better handling, more comfort, more gears and less rolling resistance.
This is likely to translate into more pleasure, faster acceleration, greater speed and some reduction in travel time.
If you want to maximize the benefits, the cost will be a lot more than your current bike (though vastly less than a car) so you would need to decide whether its worth it to you.