Although some altcoins are presently following after the price movement of Bitcoin and if you had invested in them you also get some profit from them, but Bitcoin being the head of all cryptocurrency is not yet done with it's bull and I believe after the halving when the price correction takes place that is when most of those altcoins will pump same the bull run after the halving. Coins like Ethereum have been following Bitcoin for a while now, and it will also break a new ATH if Bitcoin breaks its own.
An event which could delay the appearance of a new ATH for ETH even further, so investors need to take this into account if they are planning on buying some ETH at the moment.