To say that we need to have code SAT (System Dematerialised Securities Central Depository). It's the same code you need to buy shares. If we will need to open a day before and can do a bank or brokerage firm.
As for the risk of bankruptcy, some analysts say they do not have to worry about this year: www.isotimia.gr , www.enet.gr .
Insist, however, say that no one can predict with certainty the future, so let's keep in mind the risks and make choices based and our own intuition.