Once LTC stops being dependent on BTC in the exchanges it should takeoff, it's more stable than many of the other currencies, including BTC. Also it has better potential for mining since it's immune from ASICs, once ASICs are commonplace, scrypt currencies will be the only profitable ones out there in reach of regular people. BTC is more supported because it was first, but as time progresses, I think we'll see more support for other currencies.