Your goal is to make your Bitcoin investment profitable. There are two ways to make it profitable!
You can Buy Bitcoins and Hold it
Lend out your Bitcoins -earn Interest
You can Buy Bitcoins when it is low and expect it to go up to make a profit, that means you will have to hold on to it hoping that it will really go up. Therefore making your Bitcoin investment profitable is a chance of 50/50
The second and better alternative, buy Bitcoins, convert and lend it out so that it earn some interest. Once you have Bitcoins you will lend out by using specialized and dedicated lending platforms such as Davorcoin.
The minimum investment is $100.00.
How much investment in Bitcoins do you need? You should know that in every transaction there is a transaction fee, during purchase and during transfer.
Realistically speaking your investment in Bitcoins should be at least $140.00. Once your Bitcoin has been transferred to the coin lending platform you will be left with just enough to start your investment.
Start your Bitcoin investment at Coinbase -they accept credit cards and bank transfer. If you prefer using PayPal you can use VirWox.