Hi MPJ --
Coming down on the side of enabling -- metallics are so versatile, and I think this bag would do what you want it to in terms of glamming up casual outfits.
Maybe the blouse feels too daytime for you in a way the sequin sweater doesn't? I think the clutch would work really well with solid jersey and sweater knits, but then I'm biased (see below).
That said, I hear you on the price. I bought a metallic clutch for similar reasons to yours, but mine was vintage and $25 so that made it easier to jump.
However: there are a lot of variations on this theme out there for less and you HAVEN'T bought those, so clearly this particular bag checks a lot of boxes for you.
A couple not-so-great photos of mine below.
#1, Bling with Bland: Denim + jersey top
#2: Bling Me Up Scotty: Lurex-threaded sweater dress
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