I had to get my bank involved with a purchasing issue from Coinbase. They declared the charges as fraudulent since I couldn't get a response from anyone at Coinbase. This was back in early 2016 before the recent crypto madness too...
I'm pretty close to doing the same thing, but I hestitate because basically that will just mean Coinbase got an interest free loan from me, and the LTC are worth over twice as much now.
