after I saw the video about a little difference from these two types of crypto. 
Libra :
1. dollar digital
2. using Whatsapp
3. transactions of goods and services are more priority on facebook
4. verification by consortium members. 

Bitcoin:
1. digital gold
2. without special short message applications
3. without a third party verification process.
and if you all have other analysis, please share your knowledge here about Libra and Bitcoin.
I will prepare capital to buy Libra in 2020.