I wouldn't put any trust in Libra, that's for sure. Look who's behind it - Zuckerberg, the person who gathered our personal info via Facebook, compromised our passwords and injected a specific piece of code into every image downloaded from FB servers. What can you expect from an asset launched by someone like that?
Maybe if for long-term investments that require storing Libra in the wallet is very dangerous "as you mentioned". But for short-trades it seems very profitable, considering the hype on this coin is very big. So just take advantage of this moment as possible.
No way! I don't care about the hypothetical profit I could get from it. I'm not using Libra by no means. That's my protest against Zucker and the like who f*ck with our privacy and get off scot-free.