Verbatim from English. "Bagholder" is slang for "bag holder" or "left hand with a bag." This is an old British meme with a two-century history.
It tells about an onlooker who was handed a stolen item by a robber and then ran away. The man, confused, remained standing with the thing until the police arrived, who arrested him. If an innocent person had immediately gotten rid of the evidence, he would have avoided an unpleasant situation.
Cryptocurrency holders with a begholding strategy often remain in approximately the same position.
In the financial world, begholders are the shareholders of a failed company whose shares remain in their hands.