Leverage. Call options at 2000 strike expiring on 9/16/22 cost roughly 1000 now. For each dollar GOOG goes up (or down), the deep in money options' price will probably move roughly one dollar in the same direction, as long as GOOG price doesn't go down too much. So instead of investing on 100 Google shares for 300K dollars, she can buy 3 call options (each call option is for 100 shares) for the same money and makes three times as much if GOOG goes up, and loses three times as much (or more) if it goes down: e.g., GOOG is under 2000 in 9/16, she will lose all 200K dollars.

Essentially, she's bullish on GOOG. She's also rich enough to take the risk to leverage 3 times. She's even more bullish on RBLX though.