It may be that people who initially consider donating in bitcoins will change their minds and donate dollars instead.
The presence of this consideration in your list suggests that perhaps you or some of your readers do not realize that at present, there are web sites similar to foreign-exchange windows where SIAI can probably easily convert bitcoins into dollars.
The presence of this consideration in your list suggests that perhaps you or some of your readers do not realize that at present, there are web sites similar to foreign-exchange windows where SIAI can probably easily convert bitcoins into dollars.