Let me write down here for other

"A former takeaway worker found with Bitcoin worth more than £2bn was jailed for six years and eight months for a crime linked to money laundering on Friday.
Jian Wen, 42, from Hendon, in north London, was involved in converting the currency into assets including multi-million-pound houses and jewellery.
At Southwark Crown court in March, she was convicted of entering into or becoming concerned in a money laundering arrangement.
The Metropolitan Police said at the time of the conviction the seizure was the largest of its kind in the UK."

So a former worker found Bitcoin that linked with money laundry and she used it but I do believe this is not regular found maybe she get order from her employee to converting the asset, because if you found a wallet there still a password and etc