I think it's crazy how much is learned just while growing my channel and collabing with others. I've learned so much as to how the current algorithm works and have grown my channel in the process.
Now, I'm not big at all but I am watching some of my friends become bigger and bigger.
As for the question - What's the definition of going big? Why would you want to do so? What drives you to do youtube anyways? I think if someone is doing it for the fame, they've already messed up. I think most youtubers out there just simply love the hobby. There are some out there that might do it for fame but i think a passion is needed.