[tyrust]

The author should consider replacing "blockchain" with "Bitcoin" in their title. They spend the entire time talking about Bitcoin and do not make mention of any of the (many) alt coins that are attempting to solve various subsets of the problems they present.

None of their criticisms of Bitcoin are novel.

[readams]

None are novel, but it is a good summary of all of the problems. And there aren't any good answers to these criticisms, so they're worth repeating.

[tyrust]

There are plenty of answers to the criticisms. For example:

   * fast payment confirmation and network capacity - for BTC, the Lightning Network.  Plenty of alt coins have solutions for both of these

   * overhead that does not cost billions of dollars a year - there are alternatives to PoW

   * account security - paper and hardware wallets

Cryptocurrency is not without its problems, but you can't just list them all and conclude that the blockchain is useless. Especially when there are plenty of applications being used right now.

[helthanatos]

Applications such as money laundering and getting uneducated people to invest in a "currency"? It doesn't seem like the supporters of Bitcoin have much reason to support it