It is interesting to compare the charts of the main coins. Let's take BTCUSD and ETHUSD for now (LTC and BCH follow ETH closely). BTC has clearly been sustained, whereas ETH/LTC/BCH followed an expected retrace. This shows to me that there is an ongoing effort currently to push the BTC price up, while there is no such effort on the other coins. Is that good or bad? It could go both ways : either the current manipulator(s) decide(s) to push it further up, or pull it down. One could see it as a guardian angel, or a damocles sword over our heads.
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The pattern seems to continue a few days later, as BTC slightly kept moving up while alts have been struggling.