In longterm I think IOTA price can grow up to 500$.
really? what makes you think it'll reach $500. Have you looked at total number of coins? I think $10 is more likely, if it reaches $50 I'll be very surprised and happy. I had speculated that it would reach $5 between December and January and looks like I was right with that prediction
I base evaluations against market, not marketcap versus BTC or any smallercap coin. Given the projections of 10-35 trillion for IOT in the next few years, IOTA only needs to capture a small percentage to be +trillion in marketcap--when the devs say it will be O or a trillion, they are on point. Either corporations join in the building of the IOTA network, or it fails--there's no real inbetween (at least not beyond the context of 2-4 years).