I was dreaming away looking at the bitcoin balances on this page and deciced to put some addresses into google and see if there is something known about the owner of these addresses.
The second address I tried was kind of strange. It starts with a 3 (just like some others) indicating it's a multisig address.
But when I got googles result, I saw it's also used as a LiteCoin address!
Bitcoin address balance: http://blockr.io/address/info/3KBUuGko4H5ke7EVsq9B7PLK1c5Askdd7y
Litecoin address balance: http://ltc.blockr.io/address/info/3KBUuGko4H5ke7EVsq9B7PLK1c5Askdd7y
How can an address be both a valid litecoin address *and* bitcoin address.
This *can't* be a vanity address.
It can't be luck either,.. I suppose.
So, it should have something to do with multisig, right?
Nevermind,.. I should have digged deeper.
Here is the answer https://m.reddit.com/r/Bitcoin/comments/40og3y/exact_same_address_is_15th_richest_bitcoin/
Indeed, it's due to multisig.