Trump will not remain in power forever, and after his term ends, Putin will attack again.
As Volodymyr Zelenskyy noted in an interview with Lex Fridman, Donald Trump is capable of stopping Putin because Putin is afraid of him. However, Trump will be in power for only 4 years, and in the fifth year, Putin will prepare, learn from his mistakes, and start the war again.
"And do you think that after such humiliation – 4 years without war, he did not defeat us – he will come back and fight only us? He will destroy everything around. And if there is a risk that Trump will leave NATO – Putin will destroy Europe," emphasized Zelenskyy.