Thanks LoyceV, I took your advice and just checked the balance. And I was pleasantly surprised. No I am not a millionaire but a few thousand dollar was much more than I had expected. Looking at the value it had in 2011  (it turned out to be later then I remembered) I must have spent most of it back then except for a few dollars, maybe even less than one dollar. I contacted the friend I remember sending some, to get him into bitcoin, be he sold his years ago. And now regrets it of course. Since I have a low income and money is very tight at the moment I am tempted to sell them but I may regret that later.
What do you guys think: hold on to them a bit longer and see what happens? Since I invested only a few dollars back then there is not much risk in keeping them and see what happens in the future. What would you do in my position?