Steem went up so much because of the new low inflation rate, so you correctly took advantage of a system change (knowingly or not). Had the inflation rate remained so high, Steem would be worth less today. The inflation would have just caused a person to make a little or break even, but no one on exchanges would want to hold steem with 160% inflation. Accumulation on the exchanges began after the the inflation rate dropped, so people can speculate on it, without having to keep it inside steem power.

Great video, though, it's changed so much it needs to be gone over again from scratch like you have.