Our friends were holding their bitcoin in a wallet that was secure at one time but something happened and it wasn't. My son had read about it and notified them repeatedly by email and called them. It just disappears because it is crypto currency and I don't think anyone else profited. You earn $ by solving the algorithms is my understanding. Originally 6 families went in on this venture and my son took a small percentage for managing everything. Everyone made $. Then 1 set of friends wanted their profits to manage themselves. My son knew what was coming because he stays on top of things and moved everyone's profits but they ignored his warnings. You can't be successful at this unless you understand it and keep up with what is happening all the time.