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One observation that I made was that alts really suffer when btc is making all time highs. When it retraces to familiar territory alts can rise alongside with btc. Yup an observation made from a point of much pain as I am in steem atm... Pain feeds me..

For now that is absolutely the correlation: BTC higher, ALTS lower. However, I've seen plenty of times when big 3 run together, so just because BTC higher doesn't mean ETH and LTC have to trade lower : )