For the record, I don't accept Confederate currency either for the EXACT SAME REASON.

Data should be available with currency no more than a day or two aged.

I'm an instructor, have been for several years, but just now getting my currency and renewal back in order so I can get back to it.

It is not accepted currency, stay with real money.

My investment ratios are 40% towards real estate, 20% stocks, 20% crypto and 20% back into the business which allows me to grow the quickest.

The topic is complex with possible discussion of fiat money and reserve currency and the role of the Fed and inflation, consumer debt, etc. that could fill a book.

Also, manage a small crypto fund, I know pretty broad risk levels but it piques my interest. 

Only natural inflation, rather than artificial booms and busts (which are NOT inevitable parts of some so-called "business cycle", but are the result of the sale and purchase of Treasury Bonds to make currency plentiful or to make it scarce, like to get everybody speculating, building, and gaining things, but then to crash it so they can swoop in and buy them all for pennies on the dollar for themselves.This interest we pay....where is the credit for that debit? 

These two recently offered a two-day "crypto, DeFi, NFT, and Metaverse mastermind" for a whopping $24,000!!!!  

There is withholding requirements, currency exchange rates, long distance time zone differences, reporting back of income with taxes to their home country which for some can cause issues.I ran into these items and more over the years on commercial deals with foreign investors.