One thing I'm thinking about is about much is how money the Dutch (and their southern neighbors, the Belgians) are going to make once the rise in sea levels will have a direct impact on wealthy regions.

In the world top 5 of dredging firms 4 are either Dutch or Belgian firms. And once prime real estate, in for example Florida or the Hamptons, is in direct danger large amounts of money will change hands to reinforce the coastline. And those top 5 dredging firms have all the engineering expertise needed.

Moving extremely large amounts of rock & sand like https://en.wikipedia.org/wiki/Palm_Jumeirah and https://en.wikipedia.org/wiki/New_Suez_Canal are just warmup exercises for the amount of work that needs to be done in the next 50 years.