I had some dust in my wallet 4 years ago, today its worth 6000$.
That is a bomb attack, not a dust attack. 
Dust Attack, what it is, why it is dangerous and how to prevent falling to it.
Dust means something small, very tiny and dust attack means very tiny amount of Bitcoin.
https://blockchair.com/bitcoin/transaction/d3239fcd4ed507b1943ea4fe3cec19fff380d9cfb96d5a3b27bfba549be74a18
Dust in that attack is $0.06, not $6,000.