If someone breaks your trust and wants back in your life, how do you know if they'll be trustworthy in the future?

Do you think Putin is playing games with Trump? If Trump wants to end this war with Ukraine and Russia. Trump has to take Putin country financially and make Putin pay for his mistakes. When Putin starts to raise the taxes in his country.
Trump claimed many countries have come running to him to make trade deals, but not one agreement has been signed. Why do people believe his lies?