Merck's

(MRK) - Get Report

future is just too murky to justify owning the stock, Jim Cramer said Monday on his

"RealMoney" radio show.

Shrugging off a

deluge of reassuring analyst reports, Cramer said investors should sell the stock because its downside is unknowable and its upside limited. A Texas jury slapped the drugmaker with a $253 million judgment Friday in the first of thousands of lawsuits over its once-popular Vioxx painkiller.

"The company may have very little say in this once the Pandora's box of litigation is opened," Cramer said. "Any assurances are simply irresponsible."

A caller wanted to know if there was any merit in speculating on

Delta Air Lines'

(DAL) - Get Report

stock. Cramer said no, because the company has too much debt. The company will likely declare bankruptcy and stockholders will be wiped out, Cramer said.

A caller asked Cramer if he thought there would be a better opportunity to buy tech stocks over the next two months. "The tech rally I have been predicting ... has started," Cramer replied, adding that investors aren't going to get a 10% decline in what he called high-quality tech names like

Marvell Technology

,

(MRVL) - Get Report

Broadcom

(BRCM)

,

Microsoft

(MSFT) - Get Report

and

Apple Computer

(AAPL) - Get Report

.

"I think the opportunity for tech is here right now, and I don't want to trifle with it," Cramer added.

Another caller asked for names of stocks with both growth and income potential. Cramer suggested

Wachovia

(WB) - Get Report

, which features a dividend yield of 4% along with a "gigantic buyback." It sells at 11 times earnings, vs. "20 times earnings for average stock," Cramer said.

Cramer also said he likes

Altria

(MO) - Get Report

, which has a dividend yield of 4.25% and trades at 13 times earnings. Cramer said he believes Altria is gearing up to spin off parts of the company in a few months.

Finally, Cramer suggested

Duke Energy

(DUK) - Get Report

, which has a dividend yield of 4.3%, trades at 8 times earnings and has "terrific management."

Another caller asked whether

Google's

(GOOG) - Get Report

planned stock offering was a sign of a top in its stock. Cramer said when sectors get flooded with offerings, much like he's seeing in oil right now, that's often a sign that it's late in the game. Cramer said because Google itself is selling the stock -- as opposed to a secondary offering, in which stock is sold by company insiders -- its offering was not as big a red flag. Cramer said Google was doing the right thing by raising money while it can for acquisitions and other "good stuff."

"It's highly unusual," Cramer said, "but very smart. I think

Google deserves to trade at $350."

A caller wanted to know if it was still wise to buy shares of

The First Israel Fund

(ISL)

, an exchange-traded fund that Cramer recommended on his "Mad Money" TV show last week. Cramer said the stock was trading at roughly $15 when he recommended it, but it's now trading around $17, which is close to the fund's net asset value. "I think you have to wait," said Cramer. It would be better to buy it in the $16 range. "I am not going to endorse buying any more here," he said.

A caller who had bought shares of

Sears Holdings

(SHLD)

at higher prices asked if he should cut his losses. Cramer said Sears was not a stock that could be judged on a daily or even a monthly basis and that he was sticking with Sears for the "big changes" that lie ahead in the longer term.

In response to an email about Microsoft and steel, Cramer said he likes Microsoft and is "trying to buy it as much as I can." As for steel, Cramer said with the exception of stainless steel, which is used for aerospace, the steel market has peaked.

The mineral market has also peaked, Cramer said.

BHP Billiton

(BHP) - Get Report

, a mineral company, reports earnings this week. Cramer said he thinks BHP will trade down after it reports, but then it could be interesting. $30 would be more interesting than $32, where it is now, said Cramer.

Finally, a caller wanted to know what he should do with

Cabela's

(CAB)

, a stock Cramer had purchased for his charitable trust,

ActionAlertsPLUS. Cramer said he would sell some. Even though Cabela's wasn't an expensive stock, the stock has been hurt by the high price of oil. The problem, Cramer said, is Cabela's stores tend to be spread out across the country, which means customers often have to drive a fair distance to get to them.

At the time of publication, Cramer was long Altria, Cabela's, Microsoft and Sears.

James J. Cramer is a director and co-founder of TheStreet.com. He contributes daily market commentary for TheStreet.com's sites and serves as an adviser to the company's CEO. Outside contributing columnists for TheStreet.com and RealMoney.com, including Cramer, may, from time to time, write about stocks in which they have a position. In such cases, appropriate disclosure is made. To see his personal portfolio and find out what trades Cramer will make before he makes them, sign up for

Action Alerts PLUS. While he cannot provide personalized investment advice or recommendations, he invites you to send comments on his column by

clicking here. Listen to Cramer's RealMoney Radio show on your computer; just click

here. Watch Cramer on "Mad Money" at 6 p.m. ET weeknights on CNBC. Click

here to order Cramer's latest book, "Real Money: Sane Investing in an Insane World," click

here to get his second book, "You Got Screwed!" and click

here to order Cramer's autobiography, "Confessions of a Street Addict."