Today I just realised that “Diamond hands” is the millennials equivalent to “time in the market, beats timing the market”

There is an old quote in the world of trading "time in the market, beats timing the market". This is just an expression to state that if you hold long enough then your portfolio will go up no matter when you joined. I've just realised that the expression "Diamond hands" is the equivalent. If you're a "Diamond hander" then you're able to bear the market for long enough to see return.