You can start a new wallet on block chain for free https://blockchain.info/wallet/ and it will let you sign for payments using that wallet. But, understand that the title to this thread was made back when BTC was over $100 so 3.9 BTC doesn't cover three shares anymore. Adeel updated the cost per share info when BTC started taking a dump... basically the Jupiter unit is $7,000 and each share is 1/54th the cost of the unit which is roughly $130 USD. Now that BTC is just below $70, it's closer to 1.9 BTC per share. I've already bought two units, and the payout will still cover itself in time, it will just take longer due to the drop in BTC value. But then again, that's assuming the value stays this low (or lower), and no one can say where the price will be in 6 months or a year. If you buy a few shares now, and in 10 months BTC is back up to $200, you'll be a happy man.