I think we should hit $0.7 before it plateaus and keep around that level before ADA is listed on Coinbase in Q4 2018. By the end of the year we should reach $1.0 mark and trade between $2-3 in by Q1 2019 when Shelley is released.
After that we could see btc “decoupling”. This is when ADA will no longer be hostage to changes in BTC prices. It may overtake ETH in market cap by Q2 2019 and BTC by the end of that same year.