CNBC's Jim Cramer signals he has faith in the initial trade agreement that the United States and China settled on last week. The "Mad Money" host tells viewers they should have cash on hand in the event that Sen. Elizabeth Warren wins the Democratic nomination next year. Later in the show, he reveals when investors should take a chance and buy into the newly public Bill.com.

on Monday said the verbal agreement United States trade negotiators struck with China breathed new hope into Wall Street.

"The trade deal mattered. I know the Chinese government has a history of reneging on all sorts of agreements, but somehow this one feels different," the "Mad Money" host said.

Investors who are formulating their 2020 strategies need to be cautious in case Sen. Elizabeth Warren ends up winning the presidential election, Cramer said.

"A lot of business people are just terrified of her, and they're going to view everything she does through an extremely uncharitable lens," he said.

"So if Warren wins the [Democratic] nomination and the general, unless she immediately makes nice with health care, with banks and all sorts of other big businesses — don't bet on it — I think you'll want some cash insurance."

Cramer recommended buying the newly minted cloud stock Bill.com if it dips a few dollars.

The stock price has the potential to go higher than its $36.38 Monday close, but he thinks investors should be patient to start a position at lower levels.

"I think you should wait for more of a pullback, wait for the market to turn against this thing in a rotation ... because at $36 and change, Bill.com is just too pricey for me," he said. "If it comes down to $32, then you can pounce."

In Cramer's lightning round, the "Mad Money" host sprints through his reactions to callers' favorite stock picks of the day.

: "I do think the stock goes, probably goes under $300, and the reason I say that is because it's just so hard. It's not in Boeing's hands. When a company does not have its destiny in its own hands, it becomes at the whims and the slings and the arrows of the market, and the market doesn't like that, so I think it can still go lower. It will come out of this, though."

: "I like what DexCom's doing ... I think that DexCom's terrific."