Public blockchains have some disadvantages. Mainly the high power consumption required to maintain a distributed public ledger. Other issues include a lack of complete privacy and anonymity. This can lead to weaker security of the network and user identities. In addition to genuine contributors, participants sometimes include fraudulent members who can engage in malicious activities such as hacking, token stealing, and network congestion.
How do you overcome these?
Essentially, a blockchain can be thought of as a decentralized store or database of information that is updated in real-time and distributed across its user base for efficient record-keeping. Refining the concept further, it can become a trusted tool for the exchange of value, including information and wealth. Public chains are especially valuable due to the transparency inherent in the technology, as anyone can view and review all data recorded on each block.