Websites are roughly similar to real estate. They have an irreducible amount of paid maintenance required. Domain names are subject to renewal fees, like property tax. Hosting isn’t free, and it’s subject to a bewildering, ever-evolving variety of attacks. Hosting itself costs money. The only hope is to pay for a trust to handle all of this.

Or just assume that if your writing is as valuable as you think it is, others will recognize its worth and keep it alive.