If we define whale based on the volume of NFT sales and selected top 100 wallets with highest volume of sales as whales in each blockchain.

Based on this, and as we access to Flow data from May 9th, so I calculate this data from May 9th for all 3 blockchains to get the volumes and number of sales of top 100 whales in each blockchain.

Based on two above charts, Flow whales had the highest number of sales(maybe because of cheap NFTs and low fee cost) and Ethereum had the lowest number of sales. But in the volume part, Ethereum whales paid the most for their NFTs, while Solana whales paid the least for their NFTs.

What do "whales" tend to focus on in Flow?

In the above chart you can see the share of each collection in top 100 whales of FLOW. More than 91% of their assets belongs to TopShot and AllDay with 6.23% share of the assets of whales is in the second rank.

How common is "flipping" on Flow (selling within 24 hrs, within a week etc) compared to other chains

As we access to Flow data from May 9th, so I calculate this data from May 9th for all 3 blockchains to get the average days that top 100 whales in each blockchain keep their NFT(time between buying and selling).

Based on above chart, Solana whales keep their NFTs more than other chain’s whales, they keep it for 6 days in average while this number for Flow whales is 5.7 and for Ethereum whales is 2.7 days from May 9th.