Obviously there are seasonal fluctuations (lots of ice in winter, less in summer) but year-by-year, the extend of the ice caps at each extreme are less. (Double click to see full-sized chart). The black line represents this year's extent. Observe how it is the lowest/second lowest since measurement began. Will we hit a new low this (northern hemisphere) summer?
[Chart from this source]
Disclaimer. After nearly 40 years managing money for some of the largest life offices and investment managers in the world, I think I have something to offer. But I can't by law give you advice, and I do make mistakes. Remember: the unexpected sometimes happens. Oddly enough, the expected does too, but all too often it takes longer than you thought it would, or on the other hand happens more quickly than you expected. The Goddess of Markets punishes (eventually) greed, folly, laziness and arrogance. No matter how many years you've served Her. Take care. Be humble. And don't blame me.
BTW, clicking on most charts will produce the original-sized, i.e., bigger version.