I personally am a risk taker and always have aimed for big things, so I would go into crypto where the gains are much higher as well as looses. But if I would start a big investment worth of millions than it would be stock market.
I think cryptocurrency is within the reach of ordinary people despite the price that is difficult to change and difficult to predict with the right time and a good evaluation of ordinary people can generate profits with great risk.
But It will depend on preference. The stock market has been going on for decades now and can be easily predicted, it's a price in an already stable market that can be good if you do not want big risks, but the initial capital for it should be big and not many people can get into the stock market.