Investing in Dharma?

In the Diamond Sutra Buddha said : > Subhuti, if a person collected treasures as high as 3,000 of the highest mountains, and gave them all to others, their merit would be less than what would accrue to another person who simply observed and studied this Sutra and, out of kindness, explained it to others. The latter person would accumulate hundreds of times the merit, hundreds of thousands of millions of times the merit. There is no conceivable comparison. I do not believe in charity because it doesn't cease suffering in a long term and it doesn't solve any fundamental problems in the human world. So I'd like to follow Buddha's words but of course I'm not skillful enough to do it myself. What do you think will be the best way to help the Dharma reach more people if you have spare $100 a month? Or $1,000? Or $100,000 at once?