bitcoin can be said to be more efficient than transacting at a bank because I think bitcoin shipping is very fast even between countries between continents and can make transactions around the world quickly even when making very cheap transactions makes bitcoin better and more efficient than banks. Other advantages of recording bitcoin transactions that use blockchain technology also look neater.
Yes there are some advantages of bitcoin compared to banks and this is the reason why others are into bitcoin now, but still a lot of portion of the world believe and support banks and fiat currencies.