If you dream of being a beggar, does this mean you will become one? No, because the metaphor has different meanings.
The meaning of this dream is that you may have often been a taker instead of a giver. You see yourself as a beggar because you ask for help but never or seldom ever pay it back.
Sometimes, you are the beggar in a dream. Other times, you are one of the people making fun of the beggar. In either one of the roles, the message is the same. You should defend the beggar against criticism from people.
A beggar has literally almost nothing. In our materialistic world, we are measured by the amount of wealth in our possession. We gamble with our lives. We choose our decisions and manage our failures. The stakes are high because when we make the wrong decision, we lose out. Consequentially, some people avoid making the tough decisions. Fear of failure causes procrastination and the loss of potential opportunities. Seeing a beggar in a dream can mean you did not strike out while the iron was hot.