The spiritual meaning of finding dimes goes back to the value of the dime. The number 10 is symbolic of the circle. This can be interpreted as events coming full circle. The dime can also be representative of unity or completion of a task.
Historically, finding money has represented the presence of a loved one. It is often believed that when an individual finds money randomly, a departed loved one is leaving a symbol that she is still looking after him. It has also been noted that people tend to find dimes when they are in a difficult point in their lives.
The number 10 is considered a holy number and is often seen throughout the Bible. When counting the fingers on both hands, the numbers adds up to 10 before the person must begin counting again. The number 10 is the base for many counting systems. This goes back to ten representing beginnings and totality.
The dime can also be a symbol of confirmation with decisions. Another way to look at the number significance is to add 1+0. The number 1 is symbolic of being first, or the best. This supports the belief that dimes can act as confirmation in decision making.