El Salvador moved more than 5,000 BTC into a cold wallet this week.The disclosure by President Nayib Bukele nearly doubles the country's known stash of the digital asset.Bitcoin-forward Central American nation El Salvador this week moved $400 million worth of bitcoin (BTC) – "a big chunk" – into a cold wallet, according to its President, Nayib Bukele.In a post on X (formerly Twitter), Bukele referred to the new setup as "our first #Bitcoin piggy bank." El Salvador stored the cold wallet "in a ph...