LTC was trading on GDAX since some time but today crossed such prices Coblee publicly asked for it ot be added and got a good reply.
Adding to Coinbase means you will be able to buy LTC directly with cash without BTC in the middle.
This is at 5% now https://steemit.com/bitcoin/@kingscrown/litecoin-8-away-of-activating-segwit-may-happen-within-24h so it MAY still be a good moment to enter despite high price.