That is because bitcoins are a unique collectible unlike anything the world has seen since gold. Unfortunately much like gold some characteristics limit its direct use as a mean of exchange. Gold's shortcoming is in its physicality, Bitcoin's own is the decentralization tradeoff.
I think Bitcoins are absolutely a unique collectible. I hate to "call up" authority but its own creator was well aware of that:
Maybe it could get an initial value circularly as youve suggested, by people foreseeing its potential usefulness for exchange. (I would definitely want some) Maybe collectors, any random reason could spark it. - Satoshi Nakamoto
It might make sense just to get some in case it catches on. If enough people think the same way, that becomes a self fulfilling prophecy. -Satoshi Nakamoto
Aug. 27, 2010: Bitcoins have no dividend or potential future dividend, therefore not like a stock. (Theyre) more like a collectible or commodity. - Satoshi Nakamoto
Satoshi quotes which are correct, but also relate to when BTC was the only cryptocurrency.
Today
http://coinmarketcap.com has about 600 listed, including - if I choose one at random - Monero.
So, is a monero a
unique collectible unlike anything the world has seen since gold? Yes or No!