Because of Bitcoin's 2017 price appreciation, I don't like the risk/reward scenario for the coin. At best Bitcoin may reach 30,000- 50,000 $ in 2018 but I see a fair bit of downside risk as people start with Bitcoin as an entry but educate themselves on cryptocurrency from there. Bitcoin doesn't look great when you start to look at it technically and its development team can't seem to get anything done, which at the moment cannot function as a currency. So at its current price, why invest in Bitcoin when there's so many great projects with great tech and great teams applying blockchain to the worlds needs.