No one can get rich overnight by investing there is risk. As far as I'm concerned holding bitcoins involves people's own decision and it's not possible to get money from here in a day, it's a long term wait. Don't think of bitcoin as the only source of income. Besides other means of income, bitcoins should be invested based on own money. By holding bitcoin, there is less risk of loss and profit without any challenge if the price rises.
The price of bitcoin increases as the time passes so if someone hold it longer without selling it at any stage during fear will get huge profit. The profit from Bitcoin depends on the time of holding and it is based on the investors thoughts that how long he keeps his bitcoin.
Some people are also involved in trading with altcoins but they face troubles when the price suddenly goes down and altcoins also possess risk. Now a days one can easily buy and sell altcoins as price is regularly fluctuating and at the same time one can hold bitcoin so he can get profit from both trading and investment in current Bull season.