Last time I used my Bitcoin-qt client was a few months ago. I made a backup of the wallet to an external USB drive.
Yesterday, I started the client and after it synchronized the block-chain, I saw that I had 0 bitcoins! I restored the backup wallet.dat file and started it again, it said it was rescanning, and then the same result: 0 bitcoins! Even the transaction history is blank!
I had once done a paper backup but cannot find that now. Would that help?
Is there a way to know if I was hacked and my btc stolen?
Help... any advice and hints appreciated!