How will I know how much tokens I will receive?

Updated 

You will receive as per the holding you had at the snapshot time. 

For example:
Snapshot time: 23 Feb 2023 16:00 hours

Your holding; 100 BTC at snapshot time
Airdrop Ratio: 1 for every 100 held. 

You will receive 1 Airdrop token. 

For now you can check the holding just before the snapshot time, very soon we will come up with snapshot balance visibility for you to avoid any confusion and manual tracking.