No. The price of the XRP you need to make a $1 million payment will always be at least $1 million.

The truth is precisely the opposite. Higher prices tend to correlate with higher liquidity which means cheaper payments.

Imagine if you wanted to use bitcoin as an intermediary currency to buy a house worth $1 million back when bitcoin was priced at $100. In the process of trying to buy enough bitcoin to buy the house, you’d push the price up significantly. And when the recipient tried to convert those bitcoins into their local currency, they’d push the price down significantly. The effect would be so bad that back then, it would not have been practical to use bitcoins to buy a house.

Now, with bitcoin over $10,000, that’s a cinch. You can buy a million dollars worth of bitcoin without moving the market significantly because the price is higher and so you need a smaller fraction of the available bitcoins to do.

So a higher priced asset is a better vehicle for payments, at least if you’re targeting high value payments.