Clearly a lot of people sold coins but they still are in the hands of other early adopters i guess 
Are ther any stats on how many coins have gotten lost?
There is no way to see, if a coin is really lost. But if you want me to give you a guess: at least 1 mio Coins are lost imo. Are ther any stats on how many coins have gotten lost? Quote
Will the transaction fees alone be enough to spread the wealth?
No, we as society have to do this.When you are born wealth isn't spread equally either atm, you can be lucky or not.
Miners have to buy expensive equipment, there is no way the poor can afford this.