This is going to be a quick update, particularly since I don't know that it will post to the blockchain at all until I'm done writing it.
(Actually, I wrote that yesterday and it did not post. So I'm editing and trying again today.)
If you hold any Nebulas (NAS) tokens, just be aware that the switch to their own coins starts tomorrow today Sept. 26, 2018 and runs about 2 weeks. You can do it on your own within that period at least. After that and you need to submit a form and wait for them to manually swap out the ERC-20 tokens for their mainnet coins.
You will need to use their mobile app, which you can find from their website in order to do the swap. (Can be done on desktop with more steps using github also.)
If you'd like more details than this you can check out this company article on it.
I personally hold very little NAS, but will probably give the token swap a shot anyway.
In case you aren't familiar with the coin, it basically aims to be the search engine of blockchains. I don't know anyone else even attempting it, and the coin's so cheap right now that it may be worth the small bet that they will succeed.