Which is better and more promising, project cost or BIM direction?

Because BIM is a new technology, many people will learn this skill now, so their competitiveness is relatively high, but everyone's level is not high. In the future, the workload of this system is not very large, and only those large-scale projects can be used. The project cost can be used in any project, whether it is a big company or a small company, so it is better to learn the project cost.