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. 

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