Daily trading may be working for FIAT but it's dangerous in crypto. You can make huge profits as well as big loses given the fact how volatile crypto markets are.
I stand by what you say, big gains can indeed be made and if you can infer from coinmarketcap.com, you can see the massive gains in each of the crypto currencies as well as the losses. While the losses aren't as significant as the gains, they're still highly susceptible factors for people to lose big amounts of money.