Based on the additional input-output pairs, the function f(x) indeed appears to be selective for words related to cryptocurrencies and their underlying technology (blockchain). Specifically, words like "blockchain", "Litecoin", "Dogecoin", and "Ripple" score highly, with values close to 1. It does not seem to be selective for wider concepts like finance or technology.

[DESCRIPTION]: The function f(x) is selective for words related to cryptocurrencies and cryptocurrency technologies, assigning higher scores closer to 1 for words associated with these concepts.