For now, stock market. Both are risky but at least we have a real thing if we invest in stock.
I think no need for us to choose either cryptocurrency or stock market because all of them are way to increase our assets. And you are right both of them are risky only that stock market already proven it will depend on how you manage your stocks. The good thing in cryptocurrency is the latest trend in investment and it also created to pace the advance technology. We can invest both of them once we have enough savings to invest and enough knowledge on how to play the game in stock market and cryptocurrency.