Oh man, I'm right there with you. I had the Bitcoin wallet app on my LG G3 years ago... I found a backup USB stick with the wallet backed up to it. Tried to restore the wallet, realize I've forgotten the password. It didn't have much on it, maybe 23 mBTC or so, but that's about $700 nowadays.
I would love to understand this in detail.
If you mined it once you get a hash. When you say you lost those coins you lost the hash to the account? When you mined in 2009 was the hash smaller than today? Is brute forcing possible?
They lost the private keys, and they are not brute forceable.
https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signatu...
I kick myself for loosing the BTC my friend and I mined back in '09 on CPU time when it truly was worthless. But I was a dumb college student at the time and was simply playing around with it for a few days. I wonder how many BTC were permanently lost in this period.