In my opinion, you should try to invest with Ripple.
At present Ripple, prices are still under $ 1 but I am sure that in the future Ripple will become an expensive coin and become a good coin.
Currently, there are many Ripple coin enthusiasts because the Ripple Technology is very good and the transfer speed is very fast.
This is a good moment, then buy Ripple right now.
Can you explain how to do it by buying for 1$? If he buys 2 ripple, he will not even have enough money for transaction fees. I don't know if any exchange allows transactions for 1$. The attempt to invest such a small amount and expect any profit is completely pointless.