In a lot of crypto circles LTC is known as "Launder, Then Convert".
People have been using it to push through different transactions and to "wash" coins instead of using a tumbler.
Although LTC has Segregated Witness, it remains to be seen if they'll implement any of the further improvements that will be available on Bitcoin first.
Charlie's caution is warranted, as a lot of new people just buy the top choices on Coinbase, and don't look into what they're really putting money into.