Universe: Top 25, Volume Rank, Survivorship

How many candidate pairs do 10 coins make?

• 100
• 90
• 45

Why does a study that ranks coins by today's volume overstate past results, even if every later step is honest?

• Today's volume is always higher than past volume
• Today's list contains the coins that grew and survived, which no one could have known at the fold start
• Volume rankings change too slowly to matter