Possible World War III between U.S. , Greenland and Denmark? Stock market crash? Caused by Trump

I just saw this news, We are already scared of a AI bubble crash but if Trump sparks World War III he will have been the first president to directly cause a stock market crash and also spark a world war. I'm not even joking, if we all go to war the stock market will definitely crash, a lot of people are going to die for nothing. Does anybody know how serious this is because I am scared of a stock market crash. This one would be brutal like the Wall Street Crash of 1929, Black Tuesday. Also this threatens to disband NATO.

Here is the overview:

POTENTIAL WAR FEARS

Fears of a potential World War III breaking out have been intensified after Greenland issued a chilling warning to the United States following several invasion threats since the start of the New Year. It follows reports that NATO could also be on the brink of collapse if the US President follows through with taking the Denmark-ruled nation. 

Following months of posturing, the 79-year-old US leader stated that the use of military force to seize control of Greenland was not off the table. Still, in retaliation to Trump's comments, Denmark has issued a warning that has sparked fears war could be closer than once believed

A U.S. takeover of Greenland could be 'shattering of NATO,' warns Canada's former military commander

American officials claim they need Greenland for security purposes