Who wouldn't want to be rich? I bet most people want to achieve financial freedom, hence being rich would be the option for most of us. Money can literally buy almost everything you need in order to survive the daily basis. You can do whatever you want without the fear of where you wound get the fund if you were rich. You can start anything because you'll have a safety net to catch you in case you messed up. And you will not worry about living paycheck to paycheck because you have so much spare. It's really ideal and a wishful thinking to be wealthy enough to secure our future one day.
I assume that "decide if you want to be rich" is basically just a method of saying "if you want to be rich, you know what you need to do, if you don't do it, then you practically decide not to be rich". Obviously many things could end up blocking you from doing it, like health reasons, unexpected costs and many other things could lead you to end up not getting rich and not allowing you to make a profit.
However, if your life goes as expected, if you have a boring 3 years of your life next, if you just go to work everyday and come home everyday, then in 3 years you could be wealthy. How? Simply put, do not live, I mean sure be alive, but do not "live". Just wake up, take the bus, go to work, work, take the bus, go home, watch netflix, eat noodle or any other cheap stuff, and sleep, and repeat this for three years.
If you do this, you will hate life, it will be horrible, you will want to break the cycle and do something, maybe do it once a month just to keep yourself sane. You will end up with so much more money every month, and you could put that into bitcoin and other smart coins and you will make a huge profit in 3 years. This is of course nothing unexpected happens, you could get sick, you could get fired, you may not find a job for a long time, all of these would prevent it, I just talk about people who can do this.