I know there are a large number of them. I am one of the sad souls who did not take it seriously and lost my whole wallet after I invested $1,800 into 100 of them a long time a go. It happens and good luck to whom ever finds them.
That could be true, that's why we short of supply nowadays and the price had increase. Before when bitcoin died people lost trust with it and they do not think it will risk again. For me, it's good for the new investors so when the demand will hugely increase the supply will be short and the price will rise again.