Secure way to store BTC over a long time - and its risks? What are the most secure way to store a huge amount of BTC over a long time and its (detailed) risks? A other assumption is that the owner does not have a very technical background, thus it will not be possible to verify the code of a wallet generator. 

I am looking for a detailed overview of the risks. Even unlikely thinks like a biased random number generator of java script used by: https://www.bitaddress.org/
Or that the site is hacked and wallet generation script is malicious just when I want to use it.
An other example would be, when I use MultiBit and I store the seed in safe-deposit box it might happen that the software is not longer available and it might be difficult to recover the keys from the seed.
Bitcoin Armoury is the best thing out there for this.




What you want to do is create a new wallet with armoury, create a receiving address and send your BTC there. 
The best thing is you do not need to even be connected to the network, synchronized or anything. Armoury can run offline in the dungeons far underneath the earth (like your cellar :) )
You then create a paper backup and print it out 2 or three times. Go and store it in your bank, in your important documents and at your mums house.
Delete armoury. (Yes, but make sure you have your paper backups stored safely!)


Your coins will hang in limbo (on the network) without any transaction history or block chain tracking. COmpletely anonymous and unclaimed.

Now- You might feel like you just threw your coins into thin air and have this uneasy feeling of you will never get your coins back! I know I did. So this is what I did.

I followed the whole process I mentioned above. Created a test wallet. Went to another computer somewhere else and did the same, except I imported the wallet from the paper backup. SYnchronised to the bitcoin network. Viola - The coins appeared in the transaction blocks and in my wallet ready to spend


It is also good for managing many online wallets at the same time. One for savings, possibly donations from your websites or blogs, and a personal one, and even offline unsynchronized for the long term anonymous storing of coins.


As long as the bitcoin network will be running you will never lose offline transactions. Just make sure to keep your paper backup in atleast 3 secure seperate place- and no. Do not store it on picasa albums or gdrive.. keep it offline in a bank, locker and at your nans house under the bed, laminate it, put it in a box and bury it in your back yard next to the tree house.