also it's important that bitcoin will be stable so altcoins will start growing, if bitcoin is so volatile and we will witness a pump and dump, it will usually affect the movement of altcoins as well, so they'll not be able to grow.
That will be the scenario but since the halving is taking effect right now maybe the focus of the traders are on bitcoins since many people monitoring if it will take a big leap just like what happen before, maybe there are others who still do trades with alts but provably only few percentage since the hype is growing on bitcoins side right now.