How do you turn BitCoin profit into more Bitcoins without cashing out?

[sincitylife]

   I decided to remove that listing and create a newer one.  Sorry for the inconvenience but I need to build some trust first.  Cheers.

Here's the new listing:
https://btcjam.com/listings/3475

[sincitylife]

 8)I repaid the load off early...time for round 2 fellow btcjammers:
https://btcjam.com/listings/4018

[BBQCoinsFTW]

Well, you can sell off the 5 bitcoins and still have 1000$ left in your account and 1000$ in your pocket. Then you can do the same thing again.

But really... nothing guarantees you will double your money... or even make any profit.

[jc328]

You're basically asking to do arbitrage, or forex exchange