I suggest reading these:

GitHub
GitHub - insight-decentralized-consensus-lab/post-quantum-monero: Identifying post-quantum strategies for Monero
Identifying post-quantum strategies for Monero. Contribute to insight-decentralized-consensus-lab/post-quantum-monero development by creating an ac...
Monero Stack Exchange
What privacy issues did Monero have and still has?
Has there been any scientific research regarding the promised privacy and security of Monero? 

Have there been attacks on the Monero netwo...