I don't find holding of altcoins to be dangerous, because among the entire altcoins listed on coinmarketcap very few grew while bitcoin was declining in value. But now as the price of bitcoin has started to increase, most of the altcoins too started to increase. This confirms profit on holding of altcoins.
I think it is easier to trade than to apply a warren buffet mindset with crypto, because the market is still in its infancy and anything could happen. Whereas stocks is a developed market so people "buy and hold".