Why is it said that satx is the real satoshi?

This starts with the setting of the number of Bitcoins

The first block of Bitcoin was mined on January 3, 2009. At that moment, the number of Bitcoins in the world went from 0 to 50 BTC.

Bitcoins are generated by miners creating new blocks. On average, a new block is generated every ten minutes, and each new block is accompanied by a certain number of new Bitcoins created out of thin air. Initially, a block generates 50 BTC. Every time 210,000 blocks are mined, which takes approximately 4 years, the number of new Bitcoins generated in a block will be reduced by 50%.

This production halving event will continue to occur according to the design rules. After 32 halvings, the number of new coins allowed to be created out of thin air in a block has dropped to 1.2 Satoshi (50/2^32=1.2E-8). This will happen approximately in 2137, and the block height will be 6,720,000 (height 6.72 million). At this height, the total number of Bitcoins will reach 2,099,999,9.97,69 BTC. After that, the halving of mining output will stop and mining will no longer produce new coins. The total number of Bitcoins is close to 21 million BTC. This is how the number of Bitcoins is set, and this is where the cap of 21 million Bitcoins comes from.