Probably a correction after being oversold in the bitcoin rise hype. Remember that alt prices dropped more than just the keeping the usd value equal.
Alt values basically took 2 price hits instead of 1 and this has now been corrected.
I wonder, give me a logical explanation because it doesnt make sense to me.
Total crypto cap went from around 202 to 209.000.000.000
People sold everything,
including alts, and bought Bitcoin during the rise/pump.
Now the time gets closer to 2X, many fear that a dump/correction may happen, so they went back to alts. Since they didn't sell BTC for fiat, the price is not affected.
Of course, I may be horribly wrong, it's a bit too early for me yet.