Criticism/Disadvantages:
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Lack of personalization,
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Cryptocurrency is not attractive to all users,
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Data synchronization is very inconvenient for users, (still using the QR/code scan method, which can risk losing gadgets or devices unexpectedly, resulting in loss of bookmark data and others).
Suggestion!!! Use a data synchronization system with a much better, flexible cloud storage server, one account for all needs, and with centralized server data that is end-to-end encrypted. Comply with user privacy security regulations.