I don't think that Binance will ever become a true monopolist, due to the simple fact that other exchanges are also constantly evolving (like for example coindeal is expanding by being available in US soon). If something will happen to Binance again (better not) in some nearest future, they will lose much more than just money, but a huge part of their credibility. Being a number one is great, but it also makes you the main target.

But we can't blame Binance for this, their services are great, it's amazing platform. I hope that they won't outgrow the rest of the players to be honest.