You should create a blockchain, then distribute the tokens in a way that you think is fair (most to the creator(s), some to the Kickstarter investors, sell some to new investors, reserve a few to give to everyone who buys a ring). Then everyone who has a token would have an incentive to make sure that the tokens went up in value and anyone who had a token/share could buy or sell them on the blockchain in a trustless way for their current market value.
Best posts made by DerekW
RE: if shares in the company were available...
RE: Bitcoin: Limitations and advantages of the NFC ring
The ring could be a security 'factor' that relies on physical possession, like the Trezor.
Example: You have a bitcoin wallet on your mobile. You want to make a payment. You scan a QR code, Your wallet requests your BIP-38 encrypted key from your ring. You present it and the payment proceeds.
The only difference is that the ring wouldn't sign the transaction, the wallet would still do that, but it wouldn't do it without the ring.
If you lost the ring you would need to turn off 2-factor authentication temporarily until you got another ring. You might get your 'phone snatched, but without the ring the wallet would be useless and you could recover your bitcoin from a backup of your private key.