Arithmetic on today's supply, not a forecast. It assumes nothing about whether Cardano could attract that much money.
A coin's market capitalisation is its price multiplied by the number of coins in circulation. Cardano has 36,665,922,016 ADA in circulation at $0.2078 each, which is $7.62B. Holding that supply still and putting Bitcoin Cash's $4.53B in its place gives $0.12358443 per ADA.
Cardano is already worth more than Bitcoin Cash. Moving to the smaller cap would take ADA down to $0.12358443, which is 0.595x of what it trades at now.
Supply is held still, and in practice it moves: coins are minted, burned and unlocked, and every one of those changes the price a given market capitalisation implies. The figure also says nothing about whether the money exists to buy ADA at that level, which is the part that actually decides a price.
$0.12358443 per ADA. That is Bitcoin Cash's current market capitalisation of $4.53B divided across the 36,665,922,016 ADA in circulation.
0.595x. Cardano trades at $0.2078 today and Bitcoin Cash's market cap is $4.53B against Cardano's $7.62B.
No. It is one division: Bitcoin Cash's market capitalisation spread over the supply of ADA that exists today. It assumes nothing about whether Cardano could attract that much money, and it holds the supply still when in practice supply changes.
It sets it. Market cap is price times circulating supply, so the same $4.53B of market cap spread over more coins gives a lower price per coin. This uses the 36,665,922,016 ADA in circulation now.