I find some points about differences rather weird, so I'll comment on them.
the target audience of each crypto currency is different.
How so? Basically, in both cases, it can be potentially anyone, but mainly middle-class young adults, no?
Most people make Bitcoin an investment and store of value because of its fluctuating nature. Although currently the value continues to decline, there are still many who believe Bitcoin is "digital gold".
Sure, people do make investments in Bitcoin, and I bet some will also invest in this Libra coin. But Bitcoin price continues to decline, seriously? From what I see it's growing, and doing so rather rapidly since April and especially over the last days.
And you forgot to emphasize some important points: Libra is a coin by a company that is known for privacy violations, while Bitcoin is all about privacy. Libra is centralized, so not 100% a cryptocurrency, whereas Bitcoin is decentralized, thus providing financial freedom.