The Best drop in the game is Currency

Items don't matter unless you are in SSF.
The low drop rates and no determinism in crafting mean that.
Optimal play is done through the market so a currency drop beats anything else.

The most deterministic crafting you can do is on the market on a 3rd party site.
Want to craft an item with physical damage easy , go to the market with that currency drop.

Need a energy shield helmet, craft one at the market.
Need a weapon upgrade, craft it at the market.

Pick up those useless items which 99% are and start breaking them down
into currency!!!

Begs the question why not just use gold ?

If you are crafting anyplace other than the market.
You are crafting wrong.

This is true, though I suppose its also worth noting that for the market to be effective, somebody has to actually loot the item you want, and post it for sale.
Which in turn implies you might manage to loot the item someone else wants.

So don't just ignore your drops as automatically worthless, at least check if they're worth selling.
But ofc that still mean just using market is the way to go.

Most of my currency has come from picking up rares that rolled good stats and selling them...

Rares worth a divine are way more common than raw divines.