What can I do with my lost bitcoins? Nothing, because it disappear quickly so I will start a new one then I wouldn't do the same as my past. I learned from my past so I will be more careful with my new bitcoins. I will do double time to earn more bitcoins then I will use it in good not for gambling.
Someone would obviously not be able to do anything with his lost bitcoins, so they have to be careful before losing them that they don't lose them anywhere because once they are lost then they can only try earning more but cannot get the lost ones.