It’s not surprising that the Vikings made those journeys and settlements, but it’s probably not surprising that they didn’t long endure.
https://allthatsinteresting.com/freydis-eiriksdottir
I think that they were too nomadic for sustained growth. the source of their wealth was the plunder of their immediate and sometimes far-flung neighbors. But while their light burned brightly for only a few hundred years, The Danes were able to take a huge swath of Europe, from Greenland and Iceland to the Baltics states and Russia. The results of their genetic experiments are still visible in the native populations of every nation and tribe they overran.