1) Libra will be backed by huge organisations.
2) Bitcoin will not offer enough extra features to interest most consumers.
3) Monero will be a mature, tested, alternative providing real privacy.
I love it when people think of Monero to really take up the scene someday and right now the price value of Monero is $86.12 USD because I have investment some on Monero and I also think that it can first take on ETH but in taking on the father I guess that is on a different story to tackle first, And Monero in the long periods to come will become mature enough for this market,
Well Libra in the other hand will sure become popular because it is backed up by the government and banks I really think it can either become the digital currency of the future instead of bitcoin, But just because of the popularity of it in the mainstream, But I guess they can still never take on Bitcoin as the number 1, Well that is just my insight of what may happen but I may be wrong.