My suggestion is to add a Stack Exchange website for cryptocurrencies in general. There is just a Bitcoin website, but I have questions about cryptocurrencies in general. Maybe back when that website was started, Bitcoin was the only popular cryptocurrency, but now cryptocurrencies like Litecoin and Dogecoin are gaining popularity and they should be represented here as well. Is there a place to ask about non-Bitcoin cryptocurrencies, or would I need to propose a new site for it?
Note: This answer is outdated, as the site's scope was narrowed to just Bitcoin a few years after this answer was posted.
According to the information on the Bitcoin.SE help page, all questions about cryptocurrencies are welcome there.
- a cryptocurrency or technology derived directly from Bitcoin such as Namecoin or Litecoin
- distributed cryptocurrencies not derived directly from Bitcoin such as Ripple, Ethereum or NXT
Additionally, though there is a separate Ethereum proposal, the mods of Bitcoin welcome questions there. Additional proof on this Area 51 discussion:
However, I was wondering, whether you are aware that questions about all cryptocurrencies are on-topic on Bitcoin.SE (see our About). We do have a tag Ethereum with a few questions there already, and you would be welcome to add as many questions and answers as you'd like.
Subsequent conversation in comments on an answer there explains why the site is called Bitcoin.SE despite accepting questions about all cryptocurrencies:
To get back to you guys about my above suggestions. I had talked with SE staff about potentially changing the name of bitcoin.se already a while ago but encountered staunch opposition. I was told that name changes had been tried before and the sites in previous attempts lost great amounts of traffic and users, all but destroying the sites. It seems that a name change will be unlikely, but you are still welcome to ask questions about Ethereum there, until you get your own site.
There was a proposal on Area 51 that didn't get enough attention.