Investing into those big three would always make people feel a lot better without a doubt. Not a lot of people feel the same way about those, but I feel like they are as good as it gets when we are talking about long term investment. Of course that doesn't mean that they are going to never cause you any trouble, as we have seen from the bear run we have seen them not do that badly but that doesn't mean that we are going to end up with them not having anything good neither.
Just have a situation where you end up with a good result, and that should be fine. I believe that we are going to do fine, and for that to happen I believe that we need to make sure that life has ups and downs, hold during down, and sell during up.
That's right, it's just that each condition is different. if what has been requested all fulfilled. it is very easy and mindless (Just my Opinion). Well speaking in terms of investing I totally agree with what you have said and let me quote "life has its ups and downs, holds on to the downs and sells on the ups". my opinion let alone life, Crypto market is also like that.