That's quite the contradiction... selling for only LTC but only mines BTC xD
How is it a contradiction? The writing is on the wall for BTC mining (sans ASIC). It is a logically sound conclusion that LTC value will leap when all the current GPU miners switch over to LTC.
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It's not really logically sound. All those GPU's cost money to run, money that it's not clear LTC will be able to repay. Maybe at the current price, but what happens when all those GPUs start plowing LTC to dump for BTC? The diff will jump but the price will crash, and it will hold absurdly low until you simply can't mine enough LTC for BTC anymore. It will plow the price through the crust of the earth. The BTC gpu power that will hop on the chain isn't a whole bunch of curious alt-coin-friendly folks. They are hard core BTC-ers that hate alt-coins.
The coins that won't suffer will be the ones that don't have anywhere else to fall too.