Investing all of your money in 1 altcoin is really risky. I strongly believe that this is true because as of what is happening in the market right now which experiences low price for few months gives you a low profit for months. Although you can still gain but only gain small or worst you don't have a profit especially some coins that drop the most. Better choose to invest in 2-3 alts instead at least even if the other coin drops price still you can still gain in other coins. And if ever the other coins drop you can still have other coin that would balance the lost.