Hypothetically Avoiding Taxes

Just curious. Is there a way to use coin mixers, tornadocash, p2p exchanges, gifting to relatives, or any other tools to de-KYC your funds, make them untraceably lost, pay taxes on the "lost" coins NOW, but avoid paying taxes on any future secret gains?

Asking for a friend in the US who is writing about this hypothetical scenario for a school project. Please skip the lectures and one sentence answers if possible. Much love.