The difference is about the stability and also the centralization of Libra compare to Bitcoin.
being centralizd usually means stable and being decentralized mostly means unstable .
Bitcoin is far way better than libra because bitcoin is a volatile and it gives opportunity for investors and its keepers to earn money long term
depends on the users view . some dont like the volatility of bitcoin because it makes them confuse if which the price will heading but others like it because this gives them many possibilities .
and it is better in an aspect of being decentralized so there is no one that can interrupt you from taking benefits of being a bitcoin user.
interupt in the form of what ? because being decentralized means no one controlls it ? what about the price ? the price will fluctuate and its annoying and can interupt your plans .