Puzzle No.:7
Answer: Cryptanalysis

don't ask me how I found that out 

Puzzle No.:7
Answer: Electrum wallet

Let's try it, since they discovered a vulnerability a couple of months ago (fortunately patched)

Puzzle No.:7
Answer: VULNERABILITY

Puzzle no.:6
Answer: BITCOINTALKERSBITCOINTALKERS

Solution was to google Voynich. This guy created a specific book written with mysterious code.
Wikipedia page shows this code and corresponding Latin letters. I have decoded the letters and than there was a "shift" time.
To be honest I just pasted the letters in to shift decoder and went brute-force and that's it.

I can be next sponsor if needed.
fun fact: poptok1 was a puzzle maker in the past Thats why it was easier for me

Puzzle no.:6
Answer: BITCOINTALKERSBITCOINTALKERS

Puzzle No.: 5
Answer: repentance

I tried to send you a PM but you have enabled not to receive PM from newbies. Can you change it?
http://prntscr.com/ipqnqu

Puzzle No.: 4
Answer: MATHEMATICIAN

Let me give it a try.

WYSIWYG?

What You See Is What You Get

Puzzle No.: 2
Answer : Bitcoin maturation
(I am not that good with this puzzles, accuracy ~0%, just like the idea and want to participate, I doubt it is the wanted/correct answer but who cares, if ever it is then do not send me the $1).
Good luck for the others