How many Bitcoins are in a whale wallet?

I'm curious to understand the magnitude of wealth accumulated by the so-called "whales" in the cryptocurrency world. Could you elaborate on how many Bitcoins typically constitute a whale wallet? Is there a specific threshold that defines a whale, or does it vary depending on market conditions? Understanding the size of these portfolios and their potential impact on the Bitcoin market would be invaluable in assessing the overall dynamics and health of the cryptocurrency ecosystem.