we were surprised on how bitcoin pumped up in price. bitcoin is still the top. we can not also deny that ethereum is doing well, it rises up continuously. But if you would ask me the best option for 6 month investment, I would just choose another altcoin, maybe I can find more profit there than these two. 6 months is enough for an altcoin to pump up.There are also other promising altcoins there that are expected to boom this coming 2018.