It is already implied that if segwit is not activated in bitcoin then the developers will start testing and continue development in litecoin. This seems to be the new course that is happening among frustrated developers for bitcoin. But what about us the users? Should we start investing most of our bitcoins in litecoin? I speculate the next breakthrough in cryptospace will be found in a segwit activated cryptocoin.
What if Bitcoin Doesn’t Get SegWit?
Finally, Osuntokun also commented on what would happen in a hypothetical scenario where SegWit is never activated on Bitcoin. At first, he pointed to Litecoin, which has already activated SegWit, as an option for further testing.
“We can basically use Litecoin as kind of a testbed,” said Osuntokun. “We can basically test our software out on something that’s a little bit smaller scale to make sure it’s actually hardened and works well.”Read in full https://coinjournal.net/lightning-network-developer-explains-happens-segwit-isnt-activated-bitcoin/ 
