When you are interested in bitcoin investing the first step you should do is learn more about bitcoin.
Do not let you get misinformed about bitcoin.
If you are a beginner and have lots of money to buy bitcoin then buy bitcoin.
If you want to invest but do not have much money then you can get bitcoin by way of bounty.
store bitcoin in bitcoin purse, then continue to monitor bitcoin price developments.
If the price is down, buy as much bitcoin as possible. and when the price goes up then sell it.