I think 100 dollars for one coin is imposible thanks to the amount of IOTA. But I think we can hope in 10 next year or two. Anyway I really regret to not to buy when IOTA was ot 0,5
For the price to be $100, the marketcap would need to be around $280 billion. Could be possible in the long term.
Estimates for the IOT market is 10-35 trillion, so even if iota captures a tiny percentage, it will reach $100.