The current all time high for cardano is actually over $1 so there is some real room for growth here.

But it is a big market cap coin and it'll be pretty hard for it to move too much on the upside. It's probably not going to exceed LTC or ETH's market cap for the long term, even though it definitely may if there is enough hype in the short term.

So yeah, I'd say that $10 is a good ceiling for now, perhaps even lower at around $3-5. Realistically you won't see prices over those figures.