The purification IS happening. Money is leaving alts for bigger coins, yes, mainly for fiat, but that which remains is going towards the stronger coins.
Your "ZOO" coins are not a good representation of reality, the insinuation being that they are shitcoins. While something like PIGGY is most definitely a pathetic investment, BEE token is a very good one, it's basically crypto Air BNB, and Oyster is going to revolutionise how websites earn money (bye bye adverts) using it's Pearl and Shell tokens. Both are very serious projects.
RE: Crypto purification