How is it not open when anybody can interact with it and look at the source code, state of the chain and smart contracts? The chain is decentralized as no company is hosting the servers and can pull a google on short notice. But sure, many chains have serious problems with centralization of assets, control by a single person group..... This things, in combination with regulation, have to work itself out and the situation will most likely be completely different in 5-10 years.

You're talking as a developer.

None of the exchanges influencing crypto is actually open about their business. Eg. They even try to fake audits as much as possible. Ponzi schemes, pump and dumps, fake code-audits that reveal 0day exploits at launch and other (sometimes insider) hacks everywhere! It really is a daily wild wild west show - https://rekt.news

I will never trust a currency, where malicious insiders can walk away anonymously with my money and blame it on a hack.

"Open" and "decentralized" are the false promises of computing. The entire market is dominated by centralized companies like Microsoft and Apple.

Sound stupid? That's how your statement looks to people who understand the space.

Linux and open source software started slow but every year run more of the world because they are a better way of building things

Crypto and decentralized finance is doing the same for the finance industry. There are already $250B in DeFi protocols (see http://defillama.com) all of which are open source, transparent and decentralized.

There should be % fraud/hacked in there, if you really want to compare "a better way of building things" with actual KPI's