The fortune teller said that I would break the law at the age of 20. Is it credible?

Not credible. Now there are liars everywhere, especially those who cheat by various means. Fortune tellers can't be trusted completely. Some things can be seen in books, but the accuracy of fortune telling has not been scientifically proved so far. Some fraudsters use superficial phenomena to confuse people. When you see these fraudsters, you should call the police in time and properly protect your rights and interests through the law!