I don't see why that is impossible. If Bitcoin can have a $10+Bn market cap, ethereum can grow to that level too.
We might see 100 dollars for 1 ETH sooner than you think.
I don't think that will happen in a foreseeable future. ETH just don't have potential to beat bitcoin, not now, not yet. Maybe in the distant future.
We are on a good way to break $10 level. In the last 24h Ethereum's price gained almost 4% and Ethereum Classic almost 10%. Is it coordinated ETH pump?