The codebase of Bitcoin and other cryptocurrencies will be encoded onto film for the purpose of long term storage under the ice. The code will be buried for 1,000 years in Svalbard, Norway.
This plan can be found in the GitHub Archive Program. The program has the goal of preserving open source software so that future generations can study it. The goal for this project is to make sure that the code repositories are preserved for 1000+ years without the threat of abandonment or becoming lost.
There Will Be Backups Too
There will be duplicates of the film reels, including the Bitcoin codebase, which will be stored in Oxford at the Bodleian Library.
The creation of a secure long term archive of the code involved in cryptocurrency will ensure that these technologies will not be lost. This will also give historians the ability to view the archives in the future.