Range of numbers used in trading

From the very small to the very large...

Quantity

Bitcoin can be split into 100 million satoshi and transacted at that resolution. If you wanted to buy 1 satoshi = 0.000000001

You could also buy 10000.000000001

Other tokens with a low value can often be traded in 100,000s or 1,000,000s. But much less likely to be transacted in small fractions.

Price

Price can vary from fractions of a penny to £1000s.

BTC price £24,523.453 NewCoin price £0.00001

Balance

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Resources

https://docs.ethers.io/v5/api/utils/display-logic/#:~:text=Examples%3A,ether%20represents%201018%20wei)