I believe Yes! This coin will be a game changer. As it is backed up a few big companies like PP, Master card and Coinbase etc. Also, more than 2.2 Billion people who are using Social media will be using it, It surely going to take down bitcoin.
I'm not sure if that's sarcasm (Poe's law) but...
Libra isn't going to take down Bitcoin just like none of the other ALTs and stable coins did. There will ALWAYS have a space for Bitcoin or any possible cryptocurrency that takes btc down futurely. Libra isn't just an "coin backed up by big companies"; it is also CONTROLLED by them. They can issue new coins and possible will even be able to block funds or rollback the chain. You can't do that with Bitcoin because no one controls it fully.
Many people will use Libra for their daily needs (possibly billions), but there will always be a community that cares more about privacy and safety than convenience.