I will choose them both but when it comes to longterm I will choose bitcoin bitcoin is a bit risky because the price falls fast and the price pumps fast but if only one is a weak holder bitcoin or altcoins I think there is a possibility of bankruptcy you are one of them but for me there is nothing to be afraid of if you know that bitcoin has the potential to hold you because bitcoin is a long-term investment and you should have a strategy and plan when you will buy it and when you will sell it.