you can earn bitcoin here with some few tips https://bitcointalk.org/index.php?topic=1629118.0 while making an investment needed you to get an exchange where your fiat can be use to secure a particular amount of bitcoin rate and have your asset well reserved on your wallet which is a decentralized one, hold it by not selling for about two to four years and then sell whenever you see the price rises than your purchasing rate or value, trading is by p2p as well and all you needed is to go through the same procedures in buying for selling it, you can learn more about trading by reading threads on the speculation board and bitcoin discussion.