Seeing how the currencies and economic systems are struggling right now I just do not see a downside having some metals in investment portfolio.

The people that seek his advice are often in debt up to their eyeballs (consumer debt for ex.), and have no idea how to manage their personal finances.

A millionaire is an individual whose net worth or wealth is equal to or exceeds one million units of currency.

We sold and had the bonus of currency exchange behind our transaction, and made a nice profit. 

Sir, if you really wanna invest for guaranteed income very month, i could sign a contract with you for investing your 150K and give you 15K every 30 days. i will trade it in currency and no risk at all. guaranteed. it dont get better than that. if your interested call me at 501-548-8454. you aint loose a dime. i know you would be thinking what if i lost i say no loss. your money is your money and your guaranteed 15k every month. but you have to invest at least 6 months before you decide to withdraw your money. iam willing to sign a contract to guarantee your money plus your income. let me know

One way to do this is to purchase real estate in order to hedge against a devaluation of the currency.

Stocks/Bonds in currencies which I think are not correlated to the USD. 

Crypto is the currency of the future!

Thank ya'll for the answers but I am not conviced yet :-) If one's concern is hyperinflation then convering that inflating currency to USD is the simplest and cheapest option.

Then to transfer and convert currency, depending on the bank it could be either expensive or really expensive... use some third party exchange company like transferwise.If it is only to receive money in the foreign country, transferwise also offers a way to receive local payment with a virtual local account number.