Manuel Gonzalez Alzuru, a co-founder of a soon-to-launch non-fungible token (NFT) marketplace, says he is “doin’ good,” with a smile and a nod over a video call. “It never gets old saying that.” His platform, boyishly named DoinGud, is what Alzuru calls a “prosocial” experiment – a way to funnel some of the massive profits generated by the emergent NFT economy to worthy causes.