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Before you are thinking about selling, think twice. Bitcoin can pump insanely high since the marketcap is really small and it can potentially go to 100.000+ per coin long term, so 600 to 1000 is absolutely nothing.
The next months will be fun.
History won't repeat that easily. We are in a different setup, with different volumes involved at the moment. By different setup I mean, there is no more Wally, and there are some more exchanges so the volume is not so concentrated in one spot, it is more spread. Secondly, revisiting some price level costs usually much more volume than at the very first time. We have now much more Bitcoins circulating, as back then in 2013, and I don't see new fiat money coming to bitcoin that easily as three years ago to push it to the ath.