Do we really need more stocks to buy than foods, drugs, restaurants, utilities, real-estate investment trusts and retailers?

I think people forget that there are whole periods when only a couple of groups actually make you money. We have had waves during which health care stocks did terrifically and that's about it. We have had moments when only oil stocks worked. We have had moments when the only real gains were in technology.

So why should we care that the stocks that are going up aren't in big groups like financials, tech, energy and industrials? Isn't it enough that we isolate companies that have little international exposure and big dividends or, alternatively, some international exposure and little economic sensitivity?

Where is it written that we have to be in more than those stocks while we wait for events to unfold in Europe?

I know what the smartest people in the room are thinking: You can't own anything, because when the big bang occurs in Europe, everything will be crushed.

But here's the riposte to that: Perhaps a big bang doesn't happen. Perhaps Europeans just get mired in a terrible recession that brings down more technology stocks, more industrials and more oils but leaves domestic companies intact to climb higher.

Let's consider the cases of two purely domestic stocks, Dunkin' Brands (DNKN) and Dollar General (DG). I mention these because the odds are that if you look around your town, you will likely see these stores.

They are like Edgar Alan Poe's purloined letter, hiding in plain sight.

Now, let's go over what has happened to these chains in the time that we have waited for Europe to implode. Let's figure out how they have done while the Spanish and Italian 10-year bonds have risen in yield and Spanish banks have run short of capital. What's been their performance as Greece is obliterated?

First, Dollar General is up 20% year to date, and Dunkin' Brands has gained 33%. Those moves have happened despite dithering by the European Central Bank and German intransigence. These have been incredible moves, but perhaps more important, not only do they not have any European exposure, they also have very little California exposure. Dollar General, with 10,000 stores, is just now opening 50 stores in the state that represents one-fifth of the U.S. population. Dunkin' Donuts has just opened its first store in California. We know that domestic retailers put up their best numbers during a regional to national expansion, and both of these companies still have their runways ahead of them.

Now ask yourself whether you should have known about these two companies and whether you could have gotten in at a discount at any given time. The answer is you sure could. Dollar General has done three successful secondaries during the time that Europe has been teetering. Dunkin' Brands has done two secondaries within the past year.

That's visible.

I simply don't understand why you have to be on the sidelines, away from these stocks, because of Europe. They are there for the taking. They don't do business in Italy or Spain. They are two among hundreds I could name that have done so well during this period. I say Spain and Italy and Europe in general make you work harder to find bull markets, but they are bull markets and Europe is no excuse to miss them.

Jim Cramer is a co-founder of TheStreet and contributes daily market commentary to the financial news network's sites. Follow his trades for Action Alerts PLUS, which Cramer co-manages as a charitable trust and has no positions in the stocks mentioned.

More from TheStreet.com

• The Euro is doomed
• Best Buy's best bet
• Meet the women of Berkshire Hathaway