It would appear, based on the news this week, that major world governments like the US and others are cracking down on the notion of "government-proof privacy", and prosecuting companies and individuals who facilitate money transfer that cannot be potentially traced by a government. They are going after mixers and brokers who do not adequately engage in KYC.

In short, it would seem that governments are trying eliminate the very thing that Bitcoin--and blockchain generally--was originally designed to accomplish.

What does this mean for the long term prospects for cryptocurrencies? Will blockchain survive losing it's original purpose?

My own answer is: "yes", in the short term, and "maybe" for the longer term.

I have written before about different kinds of "privacy" that people might want, and most want privacy from other citizens, from companies, and from criminals: privacy from a targeted investigation from the government is a level that, in my estimation, a "nice to have" for most people, but not a dealbreaker.

Hence in the short term, cryptos missing their original purpose is not something most consumers care about. Most holders of Bitcoin these days do so in a centralized way, e.g. with an app or a broker that keeps their account under their name, in a centralized database.

As for the longer term, this brings up an important question: why use blockchain at all?

Blockchain is slow and expensive to transact in on purpose because of proof-of-work and decentralization. No cryptocurrency will ever come even close to scaling to the billions of transactions each day by people worldwide.

But a digital currency that is not blockchain-based can accomplish this and provide the same mechanism for speculation and value store that blockchain-based currencies provide. In my opinion, the long-term future of the actual blockchain architecture behind today's cryptocurrencies is... unclear.