Here are my two cents...

Were you driving that semi-truck? If so, perhaps that means you are capable of far more than you have ever entertained or there is some undiscovered talent waiting to emerge.

Were you on a trip where you found coins or at the flea market before you had this dream? It doesn't really matter. I am wondering if you were giving your younger self what he needed or was appropriate for the moment not necessarily that it was meant to be less valuable. Things are given or revealed to us when we most need them and/or are ready to receive them. Trust your gut (like Misho said) and know your intentions are pure when it comes to tending to your needs.