All assets lost: An address bought 80 BTC for $5.2 million 4 months ago and deposited them into a Ledger

According to Lookonchain monitoring, an address bought 80 BTC for approximately $5.2 million 4 months ago at a purchase price of about $65,000 per coin, and at one point had a profit of $1.38 million. A week ago, the address purchased a Ledger device from reseller CryptoBillis and deposited all 80 BTC into the device. All assets have now been lost.