Why would i transact with my strongest money, if i have weakest money to spend?

Why i would be doing workarounds to have privacy to spend my strongest money if i have a more private way to do it with weakest money?

I want maximum exposure to the strongest money for my savings and for sure the tool is Bitcoin!

But when i make money, its in Fiat currency, why i will change all that currency that i make and don’t keep the monthly needs in Fiat and loose money in fees by doing to many transactions?