The government has made partnership with
Coinbase and has entrusted them to hold seized bitcoins. So if anyone is saying that this is a sign of a market crash or a reason for it then don’t believe them and remain steadfast in your hodling.
If you read the article you shared more carefully, you'll see that it says they are in charge of trading the seized bitcoins, not just holding them. I mean, it's not that I care what they do with it or that I'm worried about them selling, but let's not misinterpret things.
Today, the U.S. Marshals Service (USMS), an agency within the U.S. Department of Justice that is responsible for asset forfeiture, announced that it selected Coinbase Prime to provide custody and advanced trading services for the agency’s “Class 1” (large cap) digital assets, which it manages centrally in support of federal law enforcement.