Could you give me your opinion regarding the possible taxation of other cryptocurrencies that don't have the same status as Bitcoin like ETH?

For my 2017 tax return (Switzerland), I don't know in which way I have to declare my Ether? In my opinion, it's not an action because it doesn't generate a dividend (not yet), it's not an element of fortune because Ether is a token that allows only to use the Ethereum protocol, buying any merchandise remains anecdotal.

In my opinion, no one in the Federal Tax Administration has carried out sufficiently advanced research in the field of Blockchain to answer me, however I don't wish to have any problem with the tax authorities.

And what would happen if I declare my Ether only when I decide to cash out? (I'm aware capital gains in Switzerland is free tax for private fortune)

Sorry to ask but this is the only place where I can expect different relevant points of view on this specific subject.

Thank you.