Under severe circumstances, Bitcoin would become the number one currency choice for anyone around the world to transact with. However, if fiat currencies like the US Dollar remain dominant in our world, then I see no reason why Bitcoin should become the only currency for anything in life. Bitcoin is better suited as an alternative currency for times of need. Considering that it's decentralized, no single entity controls it. Which means that if Bitcoin remains as is, it could be well-suited as a cryptocurrency for emergencies or simply as a store of value.
Over time, Bitcoin might become the world's most popular medium of exchange. Thanks to the Blockchain's inception with Bitcoin, traditional fiat currencies (USD, EUR, etc) may shift to their own private blockchains backed by various governments worldwide. As such, even if Bitcoin could not become the reserve currency of the world, it would effectively achieve said purpose in another way (such as a fiat currency using blockchain tech). Based on this, Bitcoin would be part of our daily lives either directly or indirectly. Just my thoughts