Neverwinter has a lot of currencies, and unlike in SWTOR you don't get a warning if you're about to hit a cap on any of them, so I've more than once been in the annoying situation of accidentally having maxed out a useful currency since I wasn't realising just how much of it I had been earning already.
It's really hard to keep track of what to do with each one too. I got a lot of Tarmalune Trade Bars during my lockbox opening spree a few weeks ago, but I'd never actually spent any. This weekend I finally visited the vendor for the first time in ages and was shocked to find that he actually sells rank 15 enchantments directly.
It was also only a couple of weeks ago that I actually spent Alliance Supplies for the first time (after clicking on the vendor more or less by accident), a currency that you earn in the Maze Engine campaign (which came out more than four years ago).
This inspired me to take a closer look at my currency tab, and I realised that aside from gold, Zen and astral diamonds (both refined and unrefined), I have 114 (!) other currencies on there. I think if Cryptic wants to flag anything else for a revamp some time soon, the sheer amount of currencies might be a good candidate.