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?
A good ICO to buy into would be ELQYD Ico which I am currently participating in their bounty. they have a good team and they are servicing a fast growing niche will will be bigger as time passes. You would not regret investing in the coin. also you might want to look investing into eloncity, don't know if their ico is done yet but they are a good one.