this is very intriguing and i think of it often , how will the transition from 'profits mostly from mining new coin' over to 'profits mostly from transactions' occur? is there a way to position oneself in advance to take advantage of the change over?
when i read about the transaction fee issues with LTC dust, it makes me think that small miners might be able to serve a niche market where they service transactions from specific 'front end networks' or groups exclusively, to ensure those transactions are processes quickly
sort of how electrical power plants that might use nuclear or coal powered generators for their base load still have diesel or natural gas generators on standby for peak load times