Swiss states origin and carries the associations of the country's financial centre: stability, discretion, careful management. Bitcoin names the asset. Fund names the vehicle, a pooled structure managed on behalf of investors, though the word is also used more loosely for endowments and reserve pools. The name is in English, the working language of international asset management, and the .ch ending repeats the Swiss origin in the address itself, so name and domain point the same way.
The domain belongs to the wealth category. It fits an asset manager or fund management company structuring a bitcoin product, a bank's investment vehicle for clients, a foundation's long-term bitcoin endowment, or an investment club pooling contributions. An information site on bitcoin investment products in Switzerland would also suit it, as would a family office presenting a pooled vehicle to co-investors.