An education may or may not result in one making any significant money. One could spend money on an "education" for little monetary result.
Now, do you really mean "education"? Most of what is called education today is just glorified vocational training.
You do not have to spend any significant money to get a real education. Books and lectures and discussion groups are cheap.
Most "educations" (trade schools aka colleges/universities) just qualify one to look for a job, with no actual guarantee of a job.
On the other hand, the type of education one needs to invest, as opposed to getting a job, does not have to be expensive.
If it is really a "little money", the question is moot. If it is enough to live on without depleting it, then I would learn to manage and "grow" it.