Reason for LTC on coinbase was rising was volume and volume jumped because of segwit hype.
Let segwit hype fade and you will be back to old volume.
If swegwit won't pass on LTC then LTC wil me same systuation like BTC where mining is controled by bitmain
Who will invest in next Chinaman mined coin.
How many Asic manufacturing belongs to bitmain ?

The point is that over time LTC will be also taken by bitmain and bitmain will have faster asics than those that they are selling to others ... like with asicboost in BTC. In LTC change can make some dedicated software or hubs since they control BTC that way then they will expand that tactic to LTC with slowing "other miners" stuff to lvl that they will buy but it will be less profitable than their.