Volatility of an altcoin is one of the reasons why every trader was afraid of, but if you're a trader with a brilliant thinking you won't be able to feel that, as long as you've choosen a good coin. We could not compare crypto currency with stock market, because this is involving digital money that circulates through blockchain, and yet stock market was with physical money which is a fiat cash investment. Although its also a trading but in an actual basis their system of money making acts apparently.