Looked at altcoins and they've started rallying pretty hard all at once, whats the reason for this? Is it because of Bitcoin going sideways for a decent while or some other reason?
About what "Rally" are you speaking about?
I see only EOS was pumped for +35% and that's all. Other cryptocurrencies have a very little price movement (1-10%).
After such falls, even 10% is like a breath of air. And bitcoin is no longer so popular due to the number of appeared altcoins which are more effective and better in technology. So we wait when the altcoins will break the whole market and become a new lever of influence.
I also think that after a while the altoquin will dominate the market, and the bitcoin will go to the bottom plan. The growth we see today is certainly good, but I'm not sure that this growth can continue. The market is a very unpredictable thing, so you need to suffer a bit to make a profit.
Then I am sorry to say this that you need to correct your thinking. No kingdom can exist without its king and the king stays always above everyone else. Bitcoin is the crypto king. There is no altcoin on the face of Earth that can take over its throne. I am an admirer of Ethereum, neo and few other potential altcoins but it does not mean that I would go against the facts and reality. Neither should anyone else.
The place of bitcoin could be replaced by another coin but the impossible thing to replace all of the impacts that have been made by bitcoin to the majority of the market, people and more.
someone said about NEO, and that's another joke coin with pump and dump.
People are taking it quickly without any identification.