If you have all the time to wait for an altcoin to have good value I'm pretty sure you will be rich when that time comes. If you invest on SIA or probably dentacoin which is the cheapest I can say and that you keep the tokens until its worth $1 each then I guess you are a lot richer already
Siacoin will reach 1 dollar when the Bitcoin price reached $100,000 haha. There are not much altcoin can reach the 1 dollar target like Ripple. Cheap cryptocurrency does not mean it will be high in the future. It must to has a reason and Ripple did that. Ripple has enough reason to convince the investor accept it deserves the value it has achieved.