For once I disagree for a part. I posted an article yesterday: what if we are wrong about cryptos. I will not place the link but the one who are interested can find it on my blog.
I do believe in the blockchain technology but it is a misperception that a blockchain cannot survive without cryptos. I could easiy give lot of use cases in which it can. As long as there is enough beneficially profit for all parties involved to have the crypto less blockchain running there could be no need for a native currency.
I’m not saying that cryptos will vaporize cause they will not! Just not all use cases require a currency.
Feel free to read it and give your ideas about it!