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First one took everything with it AFAIK (except steem lagged behind until it started correcting downwards (except for sbd it went up before the rest IIRC)), the other times only some of the top coins followed somewhat, not so much the rest of alts.

Off the top of my head though, haven't looked at it in some time.

We did have a mini alt run in 2018 where I was able to make some 2x returns, but don't recall if this was around the same time that Bitcoin ran up to 14k.

As you said not everything ran up, but it was more than just the top alts as I make some good returns on Golem and Wanchain that I specifically remember, but I guess that just depends on what you mean by top alts as well.

Yes that is pretty close. Alts didn't really see their time in the sun until after bitcoin peaked in mid December 2017, with the majority of the gains seen in January 2018.

Do you mean the two pumps following the $10k break?