it's better to avoid exchanges that have very small volumes and don't have clear liquidity.
alot of exchange are like that but majority are not fake or scam .
if you only got a bitcoin , why will you trade on them where bitcoin is always tradable on almost every exchanges including the best ones or the ones that has a higher volume but if you mainly have altcoins , you can find yourself trading on less known exchanges as your coins are rarely being listed on the reputable one's