What to know:

• El Salvador's Bitcoin Office announced changes Friday to how the country secures its reserve.

• Officials framed the move as "quantum risk mitigation" and "future-proofing."

• Bitcoin OG Adam Back said the shift reflects sound bitcoin custody practice.

El Salvador has overhauled how it stores the nation's bitcoin, saying the change both strengthens security today and prepares for technological risks that could emerge in the future.

In an announcement on Friday, the Bitcoin Office said the country's entire reserve has been moved out of a single wallet and spread across many new ones. Each wallet will hold no more than 500 BTC, a limit meant to reduce the potential damage if any one of them were ever compromised.