VanEck says Bitcoin could hit $4.8M if it became the global reserve asset

The investment firm made a very high valuation for BTC and gold based on the extreme case that either becomes the reserve global currency.
Source: VanEck says Bitcoin could hit $4.8M if it became the global reserve asset (https://cointelegraph.com/news/vaneck-says-bitcoin-could-hit-4-8m-if-it-became-the-global-reserve-asset)
Would appreciate your opinion about this