Ark currency investment is the most profitable investment, but it is also the most risky investment. At the moment, I don't think it is a good time to invest in coins. You should wait for the cryptocurrency market to release the bubble and then consider investing in coins.
I think so, at this time, when the price is depression and make investors panic sell, I do not believe a good time to invest in altcoins. If you want to buy, please consider investing in the long-term at good coins. BTC and ETH will be good choice to invest at a difficult time at now.