Long run is the magic word here. I have learned this in the past 3 years, and I sure did my fair share of mistakes. I do not look at the markets ever day. I have a fixed date of buying my stocks and ETFs and also my crypto.
It happens automatically and I just see the money go from my bank account to the investments I chose. I reevaluate every quarter if my decisions where ok or not. If not I slightly change my strategy and if yes I just let it roll on.
Lovely post and I hope a lot of readers will take your advice.