There are few opportunities to get rich quickly, usually only a few days or 1-2 months. Waiting for such an opportunity to appear may take several years. Only people in other industries believe that cryptocurrencies can become rich overnight. In fact, the reality is very cruel, and profit beneficiaries are usually holders of cryptocurrencies, which requires enough courage.
The guys, who used to buy Bitcoin before 2016-2017 and who were in time to sell it in winter 2017-2018 (January), used all the chances to become rich quickly. Hope in future same things will be again.