Some information circulating shows that those (Elsavador residents) who do not have a bank account are not advised to save for at least two reasons.

First, holding cash is risky. Bitcoin wallets, however, protect savings via a password or PIN, naturally facilitating regular savings of small amounts over time.

Second, savers are rewarded by receiving interest on their money. Without this incentive there is little return on savings. Maybe that is a consideration and I think other countries if their governments support transactions using Bitcoin, it is not impossible that this will happen