Are there betting markets for this sort of stuff? Because I'd like to bet that in ten years there will be summer sea ice.

Alright, I take my comment back. I checked in National Geographic. If we don’t make drastic changes, summer sea ice is projected to end after 2060 [1], although it is always possible that things spiral out of control in unexpected ways.

[1]: https://twitter.com/simevidas/status/959464878410010625

You could invest into transportation firms along traditional land/sea shipping routes, assuming the market has priced an expectation of the Northwest Passage opening up and ruining business into those firms' valuations.

I personally wouldn't say it is clickbait but it does appear to fall foul of other parts of the relevant HN guidelines:

Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize.

Funny because to me it looks like deceitful manipulation to get people to click.