There are two reasons you should go ahead and buy bitcoin as soon as possible:

1. There is a limited production run, that diminishes every year. That means bitcoins will eventually become scarcer and scarcer.
2. There has been a recent surge, which means the price will likely drop in a bit because of impatient people selling for profit.

Also, please remember that investing in Bitcoin is still a pretty high risk activity. If you've only done two weeks of research, I suggest you spend more time understanding how the market works and reading the data on past surges and crashes.