Security and Privacy Concerns: Despite providing a certain level of security and transparency, some blockchain networks still have security vulnerabilities and privacy issues, such as smart contract bugs, 51% attacks, etc., which could affect user trust and adoption.

User Experience and Educational Barriers: Many blockchain applications currently offer complex user interfaces and experiences, hindering mainstream adoption. Moreover, there's a limited understanding and acceptance of blockchain technology and cryptocurrencies among the general public, requiring broader education and awareness efforts. 

 Ugh! tau học được rất nhiều điều từ bài viết của mi, cảm ơn! @lananhio