If BTC keeps heading up ($10k-20k) Alts could really go to shit, I mean really low back to ICO levels maybe even lower. I hope that doesn't happen but everyone should be prepared.
Yeah because this rise is all about good bitcoin software upgrades, not about the fact that they will 'hand out free' altcoins if you temporarily hold btc.
It doesn't really matter why BTC is rising, it just is the direct reason that alts are down. It is just like August fork when all alts exploded straight after BCH, but then BTC wasn't rising as hard at the time. Nobody currently wants 90% of alts because they are still in early phases of development, that is why you have people crying all over BCT blaming devs or attacking the project as they are losing BTC. BTC is all that people want at the moment for this rise, and nobody knows where the top is going to be. The only thing that matters now is what another XEL holder is willing to sell at, and if BTC keeps going up to a few people they could be happy to sell at 5k, or 2k or even 1k but my guess is that probably won't happen.