Seems like the biggest generator is getting more than 50%. Is this not a problem? Is this not like in bitcoin where if one miner ever gets more than 50% of the mining power that he/she controls the network? If so.... lets move our leases to other generator than the top one! Or is this not an issue in Waves?

Here you can see that with 4.5M waves on balance, 3P2HNUd5VUPLMQkJmctTPEeeHumiPN2GkTb already has 41%:
http://dev.pywaves.org/generators/
This list is only updated daily I believe.

But here you can see that 3P2HNUd5VUPLMQkJmctTPEeeHumiPN2GkTb even is gettings 7.3M waves on balance:
http://dev.pywaves.org/lpos/
This list is more up-to-date (maybe updated every 10 minutes?).

Others are growing too, but I predict that 3P2HNUd5VUPLMQkJmctTPEeeHumiPN2GkTb will have more than 50%!

Maybe a better strategy is to lease to multiple generators? Divide your balance over them. Anyone agrees?