Hello,

This puzzles are really good, I spent a lot of time with trying to solve but without a positive results yet.

I want to share one of my point of view that You can use to solve this riddle by yourself;

1. Open -> https://www.geeksforgeeks.org/convert-sentence-equivalent-mobile-numeric-keypad-sequence/

2. Scroll down and at the bottom look for section "48" in C++ with "string input" and remove this word "GEEKSFORGEEKS"

3. Between " " put Your random words e.g "PHEMEXBTCETHXRP" OR "ETCPHEMEXBTCXRP" and above all numbers on the left side click Play button to get a result

4. In the section "Output" You should get 27-digit number, to make sure it is go to this page -> https://www.lettercount.com/, paste the results and check.

And if You have 27-digit number You are at the 50% of the road for 2.1 BTC but now I'm really don't know what should I do with that number next, so...

Good luck!