(History here, from Tatler: https://www.tatler.com/article/famous-necklace-anne-boleyn-portrait-golden-b-pendant — this version, featuring Natalie Portman, is even better:

But, it could have very well inspired Satoshi to added the dollar-stripes to Bitcoin’s design that make it so distinguishable today. On February 24, 2010, he introduced a new logo. It resembled the gold coin he had started with, but now the symbol inscribed in the middle had two vertical strokes and, unlike the Thai baht, these strokes did not cut clean through the B — they only stuck out of its top and bottom and did not cross through the middle of the letter. Bitcoin Magazine

The current version of the BTC logo was published by Bitboy, a member of the Bitcointalk forum, on November 1, 2010. He wanted to improve the last iteration released by Satoshi. He kept Nakamoto's “₿.” However, he changed its color to white and tilted it to the right. Cointribute

the number eight pops up multiple times in the dimensions and geometry of Bitcoin’s design (e.g., the B is rotated clockwise 13.88 degrees — more on this later). Per the internet language 1337, an eight resembles a B, which is short for “Block,” according to Wilson. Many of the patterns that went into creating the Bitcoin logo’s design, like the circles that eventually made up the B, contain the number eight. The dimensions of other shapes (like the rectangles in the design) had a length of 12.5 (or, one-eighth of 100, thus representing eight yet again).