Now in market situation many altcoins are best Coins for investments though my preference ethereum and ripple these Coins are top altcoins and strongest platforms now invest in this Coins will get high profits.They are potential enough to survive the unstable market and whatever the possible struggles to come. You can do search of them.And don't forget to not buy the coin with all in of your money because you need to have free money in your balance to prevent if there are any down for the price so you can buy more the coin.