Depends... do you trust me?

Trust is a hard topic to describe. There are different levels of trust but circumstance exists between those levels that change someone's level of trust, such as not giving money to the homeless to lending money to your family members. I honestly don't know where this idea developed, what began the symptoms of differentiating of what to trust and what not to trust. I do not know if it is some psychological instinct of some sort. For example, if our minds are still implemented in thinking that we cannot trust others such as in before we were just here for our own survival thus had to keep everything for ourselves to spawn and such.  But now today, you would  hope people change, you would hope that there is enough faith in humanity to trust others, that civilization is modern enough to know "Hey! Why  not give someone a chance?" But no, there are still many issues; we are still "behind" there are so many incidents that just create a higher likelihood for mistrust. But the problem is not only in those incidents we must also think about why those incidents happen. Why do people steal, kill, destroy and leave? Is it really always logical? Is it rational? Or moral? Maybe not. Thus people like to play safe. They like avoiding the possibility of being part of those incidents. Thus the trust crumbles.But there are still those who believe/trust in everything. Those we consider gullible;,or how many think of them, those who "fall into the trap."  It's not unusual seeing these extremes: those who are skeptics and those who are gullible; but, who is to say that a middle cannot exist. Where is that level where no one needs to lost and no one needs to win. I guess it just doesn't always exist.
And.. here's a cute comic ☻