Good question, yet devs all over the world are deciding to do just that. First it was due to ICO's, now the network effect. There won't be many winners on this place and Steem is at #53 place currently with rather centralized and very slow development so we'll only continue falling behind as time goes on.
Also, Eth won't be slow POW chain for long and I wonder how many smaller coins will die because of that.
RE: Steem Monsters races past EOS knights on stateofthedapps.com