There are lots of altcoins(well, ICOs) Can anyone suggest some altcoins to buy?
I searched some on ICO listing cites, but it seems a lot of them are paid to be rated high. Some coins have only 100+ members on Telegram...

I know that the price will go up and down but how to find some altcoins that is really doing something revolutionary and worth to invest?
I came across some projects these days with very limited number of members, such a Trivver. The project could not make any reasonable sales, let alone reaching softcap. Although, they were honest enough to return the money invested by their investors.
Apart from ratings or even suggestions made by anyone to you. It will be good you do some research yourself.