Seriously, https://riskfinder.climatecentral.org/place/new-york.ny.us?c... shows you the worst projected flood in the next 30 years. As you can see, there is substantial damage, but the vast majority of New York will be fine.
And mitigation of that particular risk is available at a relatively cheap price of building dykes. Which is well-understood technology. In fact there is a country (the Netherlands) that in large part consists of reclaimed seabed kept dry through dykes.
About oil, oil isn't most of our economy. Believe it or not, people realize this and it won't actually change our economic system as much as you seem to think it will.
So yes, climate change is a real problem. But "OMG, NEW YORK IS ABOUT TO BE FLOODED AND OUR ECONOMY WILL END WITH OIL" is not supported by the evidence.