Flips

How it works

Two ways to ask “what if”. Here’s an example with ETH and BTC.

Market cap

What if ETH had BTC's market cap?

We give ETH the same market cap as BTC, then divide by the supply used for ETH. NOW uses the current market cap of BTC; ATH uses its historical high.

Peak ratio

What if ETH hit its peak BTC ratio?

We find the highest recorded ETH/BTC price ratio in our available daily history, then apply it to the price of BTC today. This shows what one ETH would cost if it regained that relative strength.

Use the question below your result to flip between the two modes.

What if A had B's market cap?

Select A
Select B
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OP vs BTC market cap comparison

As of Sep 17, 2026, if Optimism (OP) had Bitcoin's (BTC) market cap of $1.54T, one OP would be worth $668.23, 6,618x its current price of $0.101.

At Bitcoin's all-time-high market cap of $2.53T (Oct 6, 2025), OP would be worth $1,101 (10,907x).

Bitcoin is 6,618x the size of Optimism by market cap. The rank gap between them is 163 places.

The gap between OP and BTC narrowed 0.36% since Sep 17, 2026.

MetricOptimism (OP)Bitcoin (BTC)
Price (USD)$0.101$76,506
Market cap (USD)$232.19M$1.54T
Market cap rank#164#1
Circulating supply2.3B OP20.09M BTC
24h change+7.42%+0.54%

Price of Optimism at Bitcoin's market cap: ($1.54T ÷ $232.19M) × $0.101 = $668.23.

Questions

What would OP be worth with Bitcoin's market cap?
Optimism (OP) would be worth $668.23 per coin with Bitcoin's market cap of $1.54T. That is 6,618x its price of $0.101 on Sep 17, 2026.
How many times would OP need to grow to reach Bitcoin's market cap?
Optimism would need to grow 6,618x. Its market cap is $232.19M and Bitcoin's market cap is $1.54T.
How is the OP price at BTC's market cap calculated?
Price of Optimism at Bitcoin's market cap: ($1.54T ÷ $232.19M) × $0.101 = $668.23.

Data provided by CoinGecko. Refreshed daily. Last update Sep 17, 2026.