Dust
Crypto amounts too small to be worth moving — and occasionally, tiny deposits sent by trackers or scammers.
Dust is a residue balance too small to spend economically — think a few hundred satoshis whose transfer fee would exceed their value. Every active wallet accumulates some through rounding, partial fills and airdrops; exchanges often offer “convert dust” features to sweep leftovers into a usable asset.
Dust has a darker use: in a dusting attack, someone sends trackable specks to thousands of addresses hoping owners consolidate them, linking addresses to identities through subsequent movement; scam variants attach lure tokens pointing to drainer sites. Unknown dust is safe to hold and dangerous to interact with — the correct response is nothing.