Even though i mine, personally i think Miner greed is greatly responsible for the demise of Altcoins and investors have been the losers, alot of developers have also lost money when they saw the value of their coin go down which resulted in them abandoning their coins.

The thing is Miners are now running out of investors who are willing to buy coins, because every coin that gains some value gets mega-dumped by large miners and multipools, investors are tired of being bag holders. IMO Altcoins in the past 2 months created the greatest transfer of wealth from non-miners to miners. Investors are also looking at short-term trading (buy low new coin and sell quickly without holding), you don't hear about many 'holders' anymore since everyone kind of knows that miners will dump an altcoin to oblivion.

I"m not saying Altcoins are dead, but i think we're entering a new phase soon where only innovative coins built from scratch will have a chance of gaining some real value. The whole Mine+dump= free money concept will also end.

Also i think POS has more future than POW.