Please do not get angry. I love this coin first times, but SIGT is dying unfortunately. I know you still want to believe but unfortunately this is the case.
I doubt SIGT has a future of BTC or ETH, but it could be at par with ZEC, DASH, etc. The true reality it is not dead as of now. Developers are available, it is coming on Bittrex soon and hopefully on other exchanges. Now we have the situation when most of the traders want to be with BTC to cash them out and to buy again at the lower price. We were at 58 BTC on buying orders , now we have 16-18 BTC. We have the same tendency with almost all altcoins.
In addition the coin is one of the most profitable for mining now.
IMHO: Dead coin is the coin with ZERO value and ZERO developers support.