Either or.

It must have purpose or i do not function very well.

Be happy

Everything serves a purpose even unnoticed.

There must be purpose

You need a purpose and mayve u can just exist and have fun but u need to find existential nuanced meaning in things even if it's subjective.

Having a purpose in life is vitally important! Studies have shown that having a purpose leads to a longer healthier, wealthier life. According to a 2010 study published in Applied Psychology, people who have a purpose live longer.

Life Needs a purpose if your going to live. Anybody can exist tho without a purpose but that Is not life

it can be either