3- centralized, pre-mined coins, pre distribution, easy to attack because of low hash power...
So, I ve sold them all during the 2018 bear market. Bye-bye Neo, Eos,Ltc, Bch,Xlm,Xrp,Dash, Zcash, Tron, Ada and Eth. 
All of them sold for SATs in order to have my first full 