When most people say, "I trust you", what they really mean is that they are willing to gamble and risk trusting you. Most people, whether they are gambling money or trust, don't want to gamble an amount that is going to hurt if they lose and so they risk small amounts trying to gain confidence. Fear is what happens when the table minimum gets raised and you have to gamble more than your confidence can cover. Eventually, if your trust is not broken and you continue to practice trusting, you can gain in trust until there is no amount that will cause you pause.

You are worth having your trust kept, and there are many people in the world whom are worth you placing your trust in them. It is unfair to both yourself and all the people whose lives you can enrich to pay for the sins of those untrustworthy people who came before. That said, there are many things in life that are unfair, it is up to you to decide if you will allow this particular unfairness to continue. Good luck!