Well many people think the same way as you did. They thought that bitcoin is the way to get rich easily. You just need to buy bitcoin and wait until the price increase, then sell it.
It's not totally wrong, but i can't say it's true too. Many people think that bitcoin will surely make them rich, but it's not true. Bitcoin isn't some magic that will turn you into millionare easily. Don't think like that, because bitcoin is so risky, and when the price drops a little, many people sell bitcoin and think this's a scam.
Sure, it will be better if you know bitcoin earlier. I hope i did as well, but now it's not that easy to be rich from bitcoin anymore. Just think bitcoin as a lucky bonus, not the only hope you have.