Seems like a bad idea. People think that once something is on the internet it's there forever but that's simply not the case. Hard drives develop errors, servers get shut down, backups get corrupted, etc. etc. Your stuff may be around for a long while but there's no guarantee that it will be permanently accessible. If you want the contents of a web page to be available to you then download said page to your computer and do proper backups, etc. This will increase the likelihood that said data will survive. This is not a problem with URLs.