The excess amount of crypto is of such little value it serves no purpose. You can't even use it to pay for transaction fees. Alternatively, crypto dust can be transferred to you, which is a form of a malicious attack. This is a relatively new form of attack where hackers invade the privacy of crypto owners. They do it by sending a small amount of digital currency to multiple addresses. They then track these funds to reveal who the owner of the wallet is.Is crypto dust harmful?