Sooo if you have tokens stream vesting on something like https://superfluid.finance/, how would you compute cost basis vs capital gains? Would you lock cost basis when you unwrap, regardless of vesting? If it's set on vesting, that'd be like computing the area under a curve...

A doodler and computerer. I like permissive/permissionless open source, smart contracts, p2p systems, room-scale VR, and NixOS.

Currently: WhatsABI

Are the tokens that you're receiving from here for the payment of your services (or rewards), or are they tokens you have previously purchased under a token sale agreement?

oh nice! Likely to be income under the assumption that the grant received was in relation to your usual business activities. 

The income will also likely be assessable upon receipt (received in an address you own) valued at OP's mkt value at that time. 

Disclaimer – The tax rules in your jurisdiction may differ.

Grant award, $OP tokens from RetroPGF. :)