If 50 STEEMPOWER gives you all the RC's you need for a day to use all the applications that you want to use, then there are zero reasons besides that to get more then 50 STEEMPOWER as a USER.
If we want the price of Steem to go up instead of generating more Steem for the holders, comments votes and transaction should cost way more than what they cost today. Even 100x more...each.
That might trigger people to invest in Steem