I don't disagree, but I have assumed the context here is basically Bitcoin investors "branching out" into some altcoins. One could make a somewhat valid criticism that this context is changing to small degree, the best examples being Ripple and Ethereum and maybe Dogecoin, where they are actively trying to source users and investors from outside the Bitcoin community (BitShares to an extent as well).
There'll be a new monero investments website soon as well, which presents the investment case in XMR without basing it on BTC, and also lists the options to buy it directly with fiat.
Yes, there will be. Monero will be $300k at the end of this year. :-)