The President of El Salvador has disclosed that all the Bitcoin purchased by the state are held in a single wallet with a single address.

Do not follow his example; these are poor security and privacy practices. Generate a new receiving address for each payment and refrain from disclosing your UTXOs to the entire world. Furthermore, for figures of this magnitude, it is advisable to separate your assets into multiple wallets, preferably hardware wallets, and protected by multisig.

Try to imagine at this very moment how many individuals and nation-states are striving to hack that single wallet and seize the fortune of El Salvador, both for its intrinsic value and the unprecedented anti-Bitcoin media spectacle that would ensue. Why simplify the lives of these entities in this manner?