Retirement is not simply a quest for material things, nor should we depend on that hyper-abomination that only wants us as miserable as possible. There comes a time when you are simply not able to work as you used to, and having savings will help you at that time. Those in their 50s and 60s probably notice that they lack the speed and stamina they had in their 20s and early 30s. And it is only going to get worse from here. Simply a part of aging, plus all the nutrient deficiencies and poisons in our foods and medicines.
It is up to you how you wish to make that saving. There are traditional IRA's and 401K's. People can and do invest in stocks and bonds. You can also start stacking gold and silver (or other precious metals, if you have serious money to invest or wish to take a bit of risk). Put a bit aside into these things as you can afford to. But. do not take investment advice from people that want to grab children's ice cream money--that $2.50 or $3.00 you spend on a single silver dime could have been put into some billionaire's pocket instead, in the name of joke-hova (who is laughing at those who are not doing anything to invest in their future despite having the means to do so).