Actually, both fields are good and profitable to invest. It's just that the way they develop is different. Crypto has a much higher speed that will generate large amounts of profit with a much faster time if you can choose the right coin. While the stock market is also good, but the speed is still lower than Crypto. It all depends on your ability, and you are free to choose as long as you can manage it well.
These two markets differ from each other not by the speed of gaining profit only
If you can gain in crypto fast, you should always remember that you can lost even faster. While stock market is not such risky platform to trade. Both are good, but I prefer crypto instead 