You can take an existing craft , make it more appealing  and end up very successful like baby boomer Jenny Doan, the owner of Star Quilt Co. She perfected a method to teach quilters how to create one in as little as one day by using pre-cut fabric patches she includes in her kits. Her key to this success were her online tutorials that appealed to wannabe quilters who liked her simpler approach that yielded quick results. It also helped that her kids were tech savvy and helped her make tutorials on YouTube that have drawn as many as a million viewers from all over the world.
So who knows maybe you have a talent or skill that can be made appealing and profitable to the world like Jenny!