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

Dow Soars Over 250 Points to Post Its Fourth Straight Day of Gains
Inflation, Chipotle, Credit Suisse and Sam's Club - 5 Things You Must Know

Inflation, Chipotle, Credit Suisse and Sam's Club - 5 Things You Must Know

Will Inflation Set Stocks' Hearts Aflutter or Be a Poison Arrow? -- Market Recon

Will Inflation Set Stocks' Hearts Aflutter or Be a Poison Arrow? -- Market Recon

The Really Big Money Rushes to Super Bowl

The Really Big Money Rushes to Super Bowl

What Warren Buffett's Two Successors Could Still Learn From the Billionaire

What Warren Buffett's Two Successors Could Still Learn From the Billionaire