How are our myths Un/ true?

I think that there are ways in which myths shape our lives for the better. Knowing that any of them could possibly come true keep us on our toes. As humans i think we have to believe in the "coming of the messiah." Especially as a Christian, i know my life would be completely screwed up if i didn't have hope for Jesus' return. In the same way we are all faced with challenges and valuing them is important. It won't always be like movies where in one scene we fight off some evil doer, and in the next realize that because we destroyed him we can now face the ultimate bad guy. But challenges do shape us for the future even if we are uncertain how or when they will. All of the myths can be present in real life situations, and some of us might be living them right now. They can shape and mold us, and help us develop our character for the better. However there are some instances where i do believe myths can be untrue for us.
"Presence of a Conspiracy" is one of those "go both ways" myths. There our conspiracies in our lives and country. We always assume we can trust everyone, but we don't know everything. This can be seen on a large scale (the government "Watergate") or on a small scale (friends that aren't so nice). Discovering them might be beneficial if we can figure them out and find a way to expose the "bad guy" in order to reestablish order. It would be extremely detrimental to chase these myths. To constantly think that someone is out to get us or there is a conspiracy threatening to take down life as we know it is not healthy. In fact, some might argue that a person that chases myths might be mentally unwell. It is important not to submerse ourselves so deeply in these myths that we become dependent on them. That we expect them to occur and wait for it or try to find it ourselves.