how do you deal with continuous Google-degrading-risk?
I stopped a site lately i ran for 10 years, because Google changed the ranking so often over the years, finally traffic drowned nearly completely like 1k visitors per month, it was so frustrating so I just stopped the webserver after so many years.
I think the sustainable way is to put more and more backlinks out there, more blog posts, etc. I actually suffered from it too.