Open a small business with a LLC from a favorable low or no tax jurisdiction. and have the LLC establish a "TRUST". Have the trust establish a SEP IRA (Simplified Employee Pension) You become the manager of the trust...
Any of these eitities can buy crypto..

Or https://www.goodfinancialcents.com/solo-401k-contribution-limits-rules-plans/ for a solo 401-k plan.,

Now if your after privacy and want to live in a tax neutral jurisdiction wink wink... that is a whole other discussion... :-)