One of the biggest YC success story is Coinbase. It has literally got "coin" in its name.

It also trades under the ticker "COIN": https://finance.yahoo.com/quote/COIN/

And after a serious beating it's still value at $48 billion.

Put it another way: of all the companies YC funded, both those who succeeded and the countless who failed, only two companies, AirBnB and Doordash, are valued more than Coinbase.

I don't think YC hates cryptocurrencies as much as the typical commenter on HN.