You can only get rich with bitcoins if you are a miners. but it requires large investment and risk in order to be profitable. considering the cost of electricity and the efficiency of miners
Not only miners anyone can become rich with bitcoins. My plan to get rich in btc or with btc is that I will work as hard as I can, at the same time the coins earned will be kept in a wallet for future price increase and sell them at that time, so I get more value of my hard work.