Putin is reputed to be in declining health and crippling pain.
It's unlikely the Russian war on Ukraine will end while Putin is still in power, but in his current physical and mental state he's unpredictable and dangerous.
https://www.news.com.au/finance/work/leaders/cancerstricken-putins-body-language-reveals-hes-in-crippling-pain/news-story/a53bb5b886a216507438bd06adce6784