Op diversification of investment is good. It is good to invest on those coins that have potential in the future. And one has to make a good choice to plan. All coins can not come up or rise up at the same time. Bitcoin is leader of all the cryptocurrencies and people are investing in it because of it value and they start their investment in the time when the price is low in the bear market and sell it when the price is rising.

The risk is for all the cryptocurrency but what matter is the long enduring. And you don't have to look into the risk of a coin to invest but the potential nature of the coin .