Though they have been higher lately, Tesla shares have been volatile this year, reaching a 52-week high in August and falling 36 percent in October.

Mark Tepper, president and chief executive officer of wealth-management firm Strategic Wealth Partners, said on CNBC's "Trading Nation," "I can't get behind the company at all."

"It's still a gamble," he added, "and that doesn't mean that the stock price can't go up, but I'm sure as heck not going to sit here and hold my breath while they figure out whether they want to run out of money or actually make some money."

Tepper says he has concerns over the company's management and that its "operational opacity" makes it hard to judge valuations: "There's just too much guesswork that goes into figuring out whether they can make money on a sustainable basis, so we're going to sit on the sidelines until our concerns are addressed here."

Overall, Musk appears to be shrugging off criticism and focused on seizing opportunities. He told "60 Minutes" that Tesla may consider buying factories that General Motors intends to idle in order to ramp up production on projects like its lower-cost Model 3 midsize sedan: "It's possible that we would be interested. If they were going to sell a plant or not use it that we would take it over."

If you're looking to invest in Tesla, or in the stock market in general, expert investors such as Warren Buffett, Mark Cuban and Tony Robbins suggest you start with index funds, which hold every stock in an index, offer low turnover rates, attendant fees and tax bills. They also fluctuate with the market to eliminate the risk of picking individual stocks.

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Video by Mary Stevens