We all know about high volatility of the coins price. Have you ever experienced a situation when the coin you bought showed totally unpredictable behavior? For example, you didn't think it would rise, but it did - and much! Or vice versa?
I bought few LTC in last dip because it is top crypto currency so I thought it will gradually raise in future. But now I realise this will move forward and it will not compensate in Bitcoin so Bitcoin is right choice in top crypto and some low market cap altcoins also good for the future journey.