$10 should be very doable. The total circulating coin supply is still low while the user base is strong and growing. Once the price catches some serious wind, it will substantially higher.
10$ should be easy. The release of the Whitepaper might get the onions go over the 5$ hump, after that, I am optimistic it would never look back again.
It is very interesting to know that the DeepOnion's white paper is coming! many investors will join when this white paper is available, this will give them more confidence and more people will buy $ONIONs