Cardano is an altcoin that is being underestimated right now, but actually ADA has huge potential, even though that potential is not yet visible, I'm sure one day ADA will grow and will be able to reach $200 in the next few years, because of users and demand for cardano is increasing.
$200 is a very high number and requires a lot of extra work for Cardano to reach it, so before you dream with that number, it's a good idea to first see how much Cardano costs in the current market so that the speculation can make sense.
Good point, and also look for further developments. It's attainable since other successful project are also came from that same start.
If Cardano continue to develop and gain widely usages, expect that the value will rise, can't conclude to how
high but success will judge it up.