The other side of the coin noun phrase
Used to refer to the opposite aspect of a subject or a situation
I like wearing white clothes, but the other side of the coin is that they easily get dirty.
Sometimes, I get lonely when living alone but the other side of the coin is that I have amazing freedom.
Working as a freelancer gives you flexibility in work time, but the other side of the coin is that you don't have a stable salary.
Holding opposing opinions on an issue or in a situation
To indulge unlikely or fantastical possibilities
He tends to cast beyond the moon, so his moniker is "dreamer".