NEW YORK (TheStreet) -- It's Monday, and that means it's time for TheStreet's Jim Cramer, co-manager of the Action Alerts PLUS portfolio, to answer some questions from of his Twitter followers. 

With issues in Ukraine clearly weighing on U.S. equities, many are wondering if it's a good time to be in the SPDR Gold Trust ETF (GLD). 

Cramer said investors should have 10% of their portfolio in the GLD ETF if they have a long-term view. With that said, he warned investors not to invest today because "it'll come back down." 

Investors have been piling into the trade as a flight to safety, but it could easily fall $40 per ounce, which is when you want to buy, he said. 

Turning to tech, Cramer said he would take a pass on buying shares of Amazon (AMZN), which did not have a good earnings quarter.  Cramer prefers Salesforce.com (CRM), which is off nearly 10% since it reported a top- and bottom-line earnings beat Thursday. 

Finally, Cramer said he actually likes Groupon (GRPN) at current levels, despite the company reporting a worse-than-expected earnings result. 

He argued the company has a lot of good assets and has been sold off enough in the short-term to warrant a long position. "Don't leave Groupon if you own it," he concluded.

-- Written by Bret Kenwell in Petoskey, Mich.

Bret Kenwell currently writes, blogs and also contributes to Robert Weinstein's Weekly Options Newsletter.

If you liked this article you might like

Your Complete Guide to Living Like Billionaire Warren Buffett

Kraft Heinz's New CFO Is Just 29

How to Make Your Life Successful Just Like Billionaire Warren Buffett

How to Live Just Like Billionaire Warren Buffett

GrubHub Is Remarkable, So It's Crazy How Many Have People Have Bet Against It