For me it's hard to see that in the near future any alt coin could overtake bitcoin as the new leading crypto currency. Never say never, but at the moment it seems unrealistic. Bitcoin became so mainstream over the last years that I don't think investors are going to abandon it just for another coin. That is why I agree with your statement that Bitcoin is king. Any crypto investor should atleast hold a bit of his money in bitcoins. There are a lot of attractive alt coin projects out there, but it's very hard to beat bitcoins over a longer period of time.