Of course you can be rich with Bitcoin and still have the right time to buy Bitcoin. Because Bitcoin's price is very low and now it is possible to earn a lot of profits in the future. So, I do not think you'll miss this golden opportunity.
Theres a chance you will rich in bitcoin, but you need to holding it even if too long to wait, until it reach to the highest value. But now, you just need to buy more while it is not yet too expensive. So that in the future you will earn a high profit if the price will become double.