hmm.. I think it is impossible for now, about Monero reach $500 this year. If we look at market trend now, the increasing of coins' price is so little.
so I don't think it will happen this year.
All maybe! If only the team of developers of Monero will popularize her and inculcate in other projects, and also a market will enter the phase of height, then the cost of Monero in 2019 will be able to attain $500 dollars for a coin. Although I am more inclined that the coin will cost $ 180.