The question is not if donations are excempt from vat, but if your tax collector will believe you that you are a non profit organisation.
So pay taxes on the income, it's still better than not having the income. If you are attempting nonprofit status, donations are less of a red flag than advertising.
But I don't see what that has to do with VAT, which you brought up.
That doesn't mean you don't have to pay the VAT just because you buy something with Bitcoin, it just means that bitcoin/dollar exchanges don't owe tax. I don't know whether VAT applies to donations.