It seems that you have what many people would call physical bitcoins. There are several kinds, but I am not aware of any from before 2011 that actually take the shape of a coin. The probably best known type is made by Casascius. Is there any additional information you could provide? Maybe a photo?
Anyways, if this is what you have, then be aware that none ...
wrt the suggestion that I put up a website with the name and address of the founder, this information has consistently been displayed on the home page since I put up the site. Agreed, there exists a theoretical possibility that I could scam and there is little anybody can do about that, even if my processes were to be audited, it's still impossible to know I ...
There absolutely are. As a matter of fact, Casascius already offers a 10 BTC silver round in addition to his better-known 1 BTC brass coins and 25 BTC gold-plated brass coins. While not coins per se, the same principal allows for bitbills and other physical Bitcoins.
The first step is to identify the specific type of coin and what company created it.
See Coindesk - 10 physical bitcoins - If your coin looks like any of those, you can find out whether it has any value and how to use it.
There are many variations:
Many physical bitcoins are novelty items and have no value.
A few may have some intrinsic value from the ...
Is there a security advantage
Kinda. On one hand, you don't have to worry about getting a virus and losing your coins.
On the other hand, you need to trust that the person who made those physical bitcoins doesn't still have a way to spend them. (They could have saved a copy of the private key for claiming those coins before writing it below the hologram.)
It is now possible to redeem a Casascius private key at MtGox if you have an account there.
Under "Add funds", choose "Redeem private key", then "SHA-256 Private Key". The full amount of the private key will be added to your MtGox account.
You have two routes here:
Sell the physical Bitcoin
Don't remove the sticker on the back. Use a website like localbitcoins to sell it to someone near you.
Some people might want a physical Bitcoin, especially since they're not being made anymore.
Sell the Bitcoin 'contained' within the physical coin.
Peel off the sticker on the back. Inside will be a ...
Casascius made physical coins with a private key attached (hidden with similar technology to scratch lottery cards). They were shut down in 2013 by the USA Treasury.
There are other companies who make physical Bitcoins but I cannot vouch for the services personally.
If it's memorabilia then a "used" coin is no problem. However it was possible to use non-...
The place you bought from, ShibeMint.com, sells nothing more than keepsake tokens. They are made of copper or silver and are worth only what someone else is willing to pay for them. They will not include a private key that allows you to then spend Dogecoin somewhere else. These are simply mementos and not a crypto currency.
Quote ShibeMint.com, these ...
A paper wallet is more secure than a physical coin with addresses, as the former you can make yourself, on your own machine, while with a physical bitcoin you never know under what conditions it was manufactured and who could have copied the keys.
You must convert the mini-private-keys to regular private-key format before being able to import them in wallets such as Litecoin-core. If your keys are based on "Casascius" then you could use liteaddress.org (fork of bitaddress.org) to do the conversion. Follow these steps:
In order to be safe download the source code from https://github.com/litecoin-...
There are a handful of people/companies who manufactured physical bitcoins, most notably Casascius.
If you have one of these, a little tamper proof seal should cover a private key. You can then import that private key into a wallet such as electrum, and send the bitcoin to an exchange where you can trade it for fiat, which will vary by your location.
A physical bitcoin is simply a metal or plastic coin-shaped object, usually with a private key embedded aside. It is functionally identical to a paper wallet.
Both are only as secure as their storage medium, and passphrase, if one was set during creation.
Bitcoin is only stored on the blockchain. Unlike a fiat currency, where the banknote holds inherent value (i.e., the banknote holds its own value - it does not rely on another system to say it has that value, and a $1 banknote will always maintain its value of $1).
Bitcoin is always on the blockchain. A wallet, or paper wallet, only holds the private keys ...
Casascius Coins are the ones that have been the most well known, though according to their website they no longer contain any actual bitcoin as of Nov 27, 2013.
I am not familiar with any others, though I did find this article to be informative.
The pictures linked in the question look like they may be the Cryptmint coins in the ...
That's not a whole lot of info to go on. I guess there should be a way to open them or remove a sticker to uncover a private key.
On the other hand you might be better off selling them on ebay as they can be worth a bit more too a collector than the bitcoin value. Although you have to be careful with chargeback fraud I guess.
There is a fairly robust market for these on ebay. One sells every few days. I have bought several from ebay with no problems (except for my underperforming post office).
PayPal is a little frustrating but you get used to it.
Be sure to post a good quality photo of the hologram and clearly describe the that it is a V1 error coin.
Casascius has resumed selling individual and rolls of coins on the official website, https://www.casascius.com/. Individual coins will be sold for a limited time only.
It is still possible to save money on individual coins by buying through resellers.
I think you can place a high amount of trust in Mike Caldwell and his coins in the short term. I've met Mike in person to discuss some possible joint ventures with my coins (CoinedBits.com). I judge him to be an honest smart person. He genuinely wants to move the Bitcoin movement forward. Scamming anyone would counter his true motives.
For the long run, ...
I can't speak for the community, but if I wanted additional measures of protection against fraud, I'd go for:
Start a company and state its details, so it can be reached and sued if worse came to worse.
Process of creating the coins should be audited to ensure no data is kept.