What must exist for a person to enjoy life?

[Anonymous]

and if what things do not happen, anyone could become suicidal?

[Jared91]

It depends on the person.

All humans need shelter, food and water. For some people this is enough to enjoy life

For most people add in doing something they enjoy and that's enough.

Then on the other end of the spectrum some people will never be satisfied

[petitedollbabee]

A social circle, like family, friends, pets or a partner. Ways to spend your time, whether that’s a job or hobbies. Basic needs such as shelter, food and warmth.

[renodnol32]

Money