I would prefer the bitcoin rather than libra because bitcoin has already good impact from many investors and it is proven while libra we do not know yet if they will success in the future even they are popular from social medias.
There is no project that can fully be trusted when it comes to decentralization rather than bitcoin, and that is exactly what will continue to make bitcoin to gain relevance more than any other coin that can be released, and not even Libra.
Libra might have talked about creating a decentralized system, but I really doubt because I do not see where that will favor them, because the cryptocurrency they are creating is a stable coin that will be more used by their users, and maybe accepted by few crypto users out there that has need for stable coins.
I am not sure Libra coin will be a coin that can serve for investment purpose and many people you see in crypto today other than the utility part of it comes for investment, so Libra may not get much investors.