Some people have been banned and had their money stolen by paypal, others have been banned from moneygram and western union for receiving frequent transfers of large amounts of money - so Bitcoin is literally the only mechanism they can use to continue their online enterprises. So, for individuals like this, Bitcoin has a gargantuan positive impact.

As for the "unbanked" world populace, Bitcoin is literally like a red carpet that has been rolled out for them, allowing them to participate in global commerce.

Bitcoin has had a positive impact on all of our lives