Trail of bits published blog post “Are blockchains decentralized?” — good question. Discussion is here — fact check.
WTF is going on, at the very beginning when bitcoin was launched this moments were clearly understood (51% attack, sybil resistance, etc.). True decentralization is possible only in decentralized environment. And it doesn’t work without decentralized networking, independently manufactured and programmed computers, and many other pre-requirements to start talking seriously.
Why and what crypto is?
Crypto isn’t about decentralization, first of all it is unregulated space, and finally is a big scare for banks and traditional financial institutions. Bitcoin is an influencer, but not a worker ;)