All you have to do is make a decision based on research first. You're targeting for the long term I think this could be an entry point to get in and start saving it until the target time you've set.

I don't think this is hard to achieved as long Cardano listing in major exchange and has big volume trade, more over if developer can bring a good development and follow all the trend on crypto world $10 or even more in 2-3 years is very likely to be achieved.