If you want to keep that $8m, yes it is.Not scary if your trade went from $400,000 to $8,000,000 in under 3 years.
Tough to sell it if you bought it at $45. The tax bill will be very high. Only worth selling if you are sure that the stock price will go down. Better option would selling way out the money upside calls.
They have been making that argument for years. Missing the point of Tesla. Not just a car company.