Altcoins will definitely move but will not outperform bitcoins. Bitcoins will be the first one to show growth in any cycle and altcoins will only follow the path. Altcoins are usually treated as a secondary mean of investment as compared to bitcoins. Consider any trader or holder, their first preference would be bitcoins. They would at least have some bitcoins and then they would prefer investing into altcoins. This will make bitcoins as their choice currency and in any season, they would first invest in bitcoins to enjoy the rally. Altcoins will follow what bitcoin does so people will gradually start investing into altcoins as bitcoins stabilise.
This has been an ongoing topic for years now but the answer remains the same. Bitcoin has dominated the crypto space being the first ever mined coin and people will not change their decision anytime soon. This will always make bitcoins outperform the markets.
Yeah, we are going to see altcoins do a lot better after bitcoin gets it's increase first. It's not going to be that difficult, but it will be right there. The time difference isn't huge, usually happens quite quickly so if you really want to, you can still stay at altcoins, but make sure that you handle it well. Because if you pick the wrong altcoin, then you are going to end up losing a lot more, and that's not really a good decision.
It should not be that easy to handle, and it should be something that will take time. I believe the best we can do right now is the fact that we are going to see how bitcoin will stand, while "some" of alts will not, and you have to make good decisions to be not in one of them.