區塊鏈缺點

Disadvantage:

  • Slower process

Blockchain can slow down when there are too many users on the network

  • High energy consumption

Some solutions consume too much energy
Note:
Bitcoin uses the Proof-of-Work consensus algorithm that relied on the miners to do the hard work. The miners are incentivized to solve complex mathematical problems. The high energy consumption is what makes these complex mathematical problems not so ideal for the real-world.

  • Inefficient

Blockchains are sometimes inefficient due to how they operate
Note:
Use Bitcoin as example:
First of all, when I tried to set up the bitcoin miner on my system, I quickly found out that the ledger can easily cross 100’s of GBs. It was not efficient in data storage which can lead to storage problems for multiple nodes who want to become part of the network.

  • High cost

Blockchain implementation is costly process

  • Interoperability

Blockchain doesn’t offer interoperability as of now

  • Harder to scale

Blockchains are harder to scale due to their consensus method
Note 1:
The transactions are completed depending on the network congestion. This problem is related to scalability issues with blockchain networks. In simple words, the more people or nodes join the network, the chances of slowing down is more!

Note 2:

However, all these solutions are still not at par with the centralized systems. If you compare Bitcoin and VISA transaction speed, you will find a huge difference between them. Right now, Bitcoin can only do 4.6 transactions per second. In comparison, VISA can do a whooping 1700 transactions per second. This means that in a day, it can do 150 million transactions per second.

  • Data is immutable

Blockchain cannot go back as data is immutable

  • Self-maintenance

Users have to maintain their own wallets or else they can lose access
Note:
Users Are Their Own Bank: Private Keys – if you as a user who forgets its private key, are eventually logged out of their wallet and no one can get it back.

  • Still not mature

It still has a long way to go before it matures and get standardized

  • Integration

It’s hard to integrate into legacy systems

Ref:
https://101blockchains.com/disadvantages-of-blockchain/

專有名詞:
DLT: Distributed Ledger Technology