Bitcoins market cap is only 200 billion and its above 10k. 2018 we are for sure going to see a bigger boom as more new people and new money starts being poured into crypto. Bitcoin has the potential to surpass 20k USD when the hype builds up around it again. Ethereum being in the 2nd position will follow up beside bitcoin and very easily come close to 10k if not pass 10k.
Early 2017 people couldnt imagine hitting 10k USD by the end of the year but by the end of 2017 bitcoin hit 20k USD. Open your mind and dont be so stuck with what seems impossible.