With linking BTC and LTC together, BTC holders realize the litecoin highway is about to get a lot busier with this new feature, therefore will begin putting some BTC into LTC with the anticipation of litecoin's highway getting fatter and getting higher returns. That'll then set off a chain reaction of the price shooting up. We may see LTCs price get closer to its true value ratio which is 1/4 of BTC. Or at the very least $500 or close to it.
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From @nickwilson