The Four of Pentacles is the Lord of Earthly Power and is aligned with Sun in Capricorn. It represents responsibility, power and mastery of the material world.
Fours also represent foundations and manifestation of the energy contained in the Suit. Since this is the Suit of Pentacles, then this card brings material manifestation and the ability to create resources and create financial stability which leads to growth.
The warning with this card is to not grasp too tightly to those resources you have accumulated. In order to maximise the potential of material prosperity, it is necessary to circulate and not hoard the energy. For example, money likes to be put to use - whether through investing in projects that have the ability to expand, or by investing and being put to work in this way.
The same way that a garden must be tended and pruned and harvested, so must money and resources be tended and used. If you put your money under the mattress, then it has no opportunity to grow but instead will stagnate and not benefit anyone.
When the question refers to work or career, there is an increase in responsibility, remuneration and also pressure to perform. If you feel secure in your abilities and certain that you have come into a maturation of your power, then you will thrive and are forming a base from which to launch your ambitions and abilities even higher.
But if you feel that you came into this elevation of position as a stroke of luck or a fluke, then your own doubts will not allow the foundation to hold and you will be in danger of toppling over.
How do you manifest power in your life - does it flow like an electrical current, alive and constantly on the move, or do you cling on to it when you find it, until it peters and splutters out?
Image is from "Enchanted Tarot" © Amy Zerner