I am really intrigued by this question and I feel like it comes out of a place of fear for most people. Fear that they've missed out on a "once in a lifetime" opportunity. Fear that they won't have another opportunity. Or maybe fear that they will have to work a job they hate the rest of their lives. I just wanna help address some of these fears.
The reality is. Those kind of opportunities are more common then we think. We just get so caught up in our lives that we miss opportunity. I wanna say this. Bitcoin is a very very new technology. If you look at the age of the computer, cell phones, the internet. You can see that it's still a baby and has a ton of room for growth. Yeah sure you may not have bought when it was $1 a coin and made your millions. But there is still a tremendous amount of potential for profit. Just don't be afraid to get out there and invest.
Do your research and understand what your doing and remember. This is what life is about, taking chances, taking risks, being aggressive in our pursuit to happiensss. Those who risk much will gain much. I personally believe in bitcoin as a worthwhile investment far more then I believe in stock market, gold or real estate. Invest well :)