There is a difference when we say blockchain technology and blockchain projects.
No doubt, blockchain technology is, was and will be decentralized as no one had and will be able to patent it ever. So you shouldn't fear the future of this technique.
But yes on other hand it is being excessively manipulated by shitty projects.
See what Yahoo62278, a campaign manager on forum has to say about ICOs
A team spends 100-200$ and gets some wallets made and tokens produced. Then they launch their ICO(paying bounties with tokens) and if they don't make any money they can still pay out tokens and only lose the 200$ investment. Who cares if it gets listed or not in their opinion. If they don't make money obviously it's not gonna be listed. I get contacted by at least 5 companies a week that have this strategy going on.
There is great need to recify this if we wanna see bright future of cryptocurrencies. Regulation can be one solution.