Over here also: the Chancellor's "Autumn Statement" ("mini-budget") yesterday completely abandoned his predecessor's stated aim to return to an eventual surplus by the end of the parliament in 2020. (He now has Brexit to pin the blame on for that, having been a "remainer", himself.)
You've got to know when to hold 'em Know when to fold 'em Know when to walk away And know when to run You never count your money When you're sittin' at the table There'll be time enough for countin' When the dealin's done
The most important "skill" is to be using a trading strategy that actually works. Once you have a good strategy everything else is easy.
The most important skill is not to use that strategy but to create it first. Creating it is far more difficult than using it. Using it will probably not require much skills, except from having an average IQ and being able to use it.