Satoshi's Secret hunt
Solved.

🕵️ Riddle #1: 'Transformation'
I start as one but can be two,
A protocol change; do you have a clue?
Once I split, there's no going back,

What am I, with my history unpacked?

Answer: Hard fork

🕵️ Riddle #9: '128889'
Event hides, in attendance it resides.
In binary's tongue, find numbers yet unsung.
Date of birth, not human, yet still of worth.
Twelve in a row, find them so I can show.
Say the secret words, from wallet's depths it's heard.

Answer: Talk nerdy to me