30% to 50% inflation in usa?

Hypothetical question we should be ready for:
What would be the best portfolio if we get

30% to 50% inflation in usa

I have 20 % of my holdings in silver and gold (physical bullion), 50% cash, 30% shares atm

would Australia get high inflation also? as usa is the reserve currency

should i buy more silver gold? or is 20% enough, i usually have 90% shares

I am not sure whether to hold any shares atm, i am thinking of going 70% silver and gold (physical bullion)?

Also what would be the CFD's to get if high inflation for the usa?