Such as what?
Precious metals come to mind.
You are really asking that question?
Gold/silver/PM. Bitcoin if you’re really ambitious. Maybe some of both.
Gold, silver, bitcoin. The first two can be confiscated. Bitcoin cannot be confiscated. Have some of each, for diversification. The only cryptocurrency with longest track record, the best developers, and the most decentralization is Bitcoin. None of the other so-called “sh!tcoins” will do.