Firstly, people hate Mark Zuckerberg after his data selling incident. How can you possibly believe in a person who once stabbed on your back? Secondly, cryptocurrency is all about decentralization meanwhile Libra is obviously centralized. Finally, Libra, with the population of facebook, will affect crypto and make goverments take eyes or even insert their nose to cryptoworld. The only thin Libra can contribute is a free marketing tool to cryptocurrency world.