You get more of it in a cold brew than in a hot cup. Essentially, you are making coffee concentrate. Bigger punch in a smaller batch.
For some, coffee can be hard on the gut. Because the coffee beans in cold brew coffee never come into contact with heated water, the process of leaching flavor from the beans produces a different chemical profile from conventional brewing methods thereby giving you a cup of coffee with lower acidity.
You know how a pot of coffee will go stale if left out all day. With cold brew coffee, you don't need to worry about that. Leave it in the fridge for up to 14 days and you will still get the rich, smooth flavor and caffeinated punch.
Don't Like It Cold?
Heat it back up, but not in the microwave. Consider bringing up the heat on the stove top to preserve those rich flavors.