......Coming back to bitcoin: if the graph that @LFC posted would turn out to be true and bitcoin doubles at some point from 120 to 240K within 2-4 weeks, how many would happily take profits instead of holdling.
IMHO, not many...as rapid gains are addictive.
Some guys take gains on the way up, and you don't have to be outrageous about how much gains you take on the way up. Sure even some guys who take some gains on the way up may well feel bad if the BTC price drops and they might feel that they did not take enough on the way up, so then when the BTC price starts going back down, then they might feel trapped to not take gains on the way down when they should have had done so on the way up.
There is also the case that a mere doubling is not necessarily enough. There were various points in both the 2017 price rise and also several points in the 2021 price rise that the BTC price doubled and kept going up... even though surely in the 2021 price rise we ended up having the BTC price come way back down below both the 200-WMA but also below the 2017 high..... which was not the case in the 2017 price rise.. so in the 2017 rise we had a wee bit more than 5 doublings.. if we start from $500-ish in late 2016..
1 = $1,000
2 = $2,000
3 = $4,000
4 = $8,000
5 = $16,000
so selling large portions of your stash after the first, second or third doubling would have had been a wee bit of trouble and even leaving you with less BTC since the price really barely got back below the 3 doubling when it finally did correct back down... so how are we going to know when the UPpity is going to stop, except not to get too overly excited by selling too much too soon.. which still can be accomplished with some levels of moderation in selling rather than going balls to the walls in regards to selling too much too soon.