bitcoin was designed to be use as currency in daily transactions.
Yes but due to the fact that it has not been adopted globally makes it difficult to transact with it as we normally use Fiats to to exchange with anything we need but in due time when bitcoin will gain full adoption, it will stand for its purpose as decentralized medium of transacting with one another. Though some countries like El Salvador that has made it a legal tender still uses it for daily transactions but it's literally and mostly for internal transactions within the country but if it gets approved by the US government as strategic reserve asset, countries can possibly use it for international transactions.
In as much we want Bitcoin to succeed, we have to put in mind that it is not possible to have the global adoption just like Fiat, one thing for sure in major centers as times goes on it will become a conversant currency for transaction. Bitcoin doesn't need a legal approval from the government, as long there is no ban every individual both in their business can adopt the use of Bitcoin as a measure of payment, that's how advanced the system is becoming.