An easy and efficient way to handle your eleemosynary (charitable) responsibilities is to set up an institutional charitable giving account. Such accounts are easier to set up than checking account and all the major financial institutions (such as Fidelity) have them available. You contributions to them are immediately tax deductible, and then you direct, whenever you want, disbursements be made from that account to any IRS 501(c)(3) entity. Fidelity does all the record keeping and disbursing for you. And you not only can set up and replenish your account with cash, you can do so with stock, mutual fund shares, bonds (even non-publicly traded bonds), and, yes, bitcoins (whatever they are). The link below will give you Fidelity's explanation of its charitable giving account.
Link to Fidelity Charitable Giving Account Description