Ted Allrich is the founder of The Online Investor and author of the just released book: Comfort Zone Investing: Build Wealth And Sleep Well At Night. In this weekly column, he'll offer advice to investors who are just getting started.

As of this writing, a Euro costs $1.37. That's the most one has ever cost. A pound costs $2.02, not seen for decades. What's with the dollar, and as an investor, should you care?

The answer is, of course you should. You know the BMW you lust for? That will cost you more. It's paid for with Euros. How about Earl Grey tea? That will be going up in price, too. You need pounds to buy that. Not here in the U.S. We still transact with good ol' greenbacks here. But the store selling the tea or the auto dealer prepping your new ride has to pay the manufacturers in Pound Sterling and Euros respectively. That means less of those items will be sold because the law of supply and demand says that when prices go up, fewer things are sold.

As an investor, you have to check your portfolio for any holdings headquartered in Europe. If they have large sales to the U.S., those revenues are going to shrink. Profits will follow.