We can't really predict about the altcoins' movement. But normally, the top alts follow the market trend of btc. But only those that are already established in the market. Now, if we are talking about specific alts, it is better to follow their respective developments. Because their actual developments and progress will have significant impact on their market value. If traders will not see movement from the team, then I don't think they will be interested to trade with that coin, unless, it has specific use case for them like using for transfer purposes because of very minimal fee for transaction.