I failed to mention that the interview with Charlie Lee was conducted just prior to LTC being added to Coinbase (it was already listed on GDAX at the time). There was a lot of speculation at the time of that interview around whether or not LTC was going to be added to Coinbase. And Charlie Lee (Coinbase employee and LTC creator) was telling the interviewer essentially what he thought needed to happen before Coinbase would consider adding LTC - mainly they wanted to see good consistent high trading volume on GDAX.
I was simply trying to make the point (probably poorly) that if those are / were the conditions that got LTC listed on Coinbase (according to Charlie Lee). Then Monero will likely need to do the same. Which is get listed on GDAX first, and have good consistent high trade volume on GDAX.
Full disclosure, I've never owned LTC, and except for a few Aeon I mined, XMR is the only coin I hold. I don't even hold BTC anymore. I've been a (happy) XMR bag holder for 3 years now 
Sure but wasn`t LTCs volume rather shitty in the west after the great downfall of 2013/2014, compared to most other Top10 Coins in average? Afaik the big volume always was from the asian regions eg. China.