Bitcoins first solution is dismembering the hidden tax mechanism which is fiat and inflation. That system gets dismembered regardless of whether the adoption is costodial or not. Costodians will need to be 100% reserved and will have to settle back on chain which will force them to be reserved as well. It would be best if we fight the inflation fight first and then the tax fight second. This way we are not "money launderers" in the eyes of statist masses. The statists need to be onboarded before they can change their thinking on taxes IMO. This^ is the race to avoid the war.