Look, no one's gonna sell such a premium domain for $100.
It's barely a premium domain, according to
.WIN domain WHOS Search, it was registered in October last year, 4.5 years after the
.win TLD became available. If anyone wanted to have this domain, they would have had years to register it. Considering nobody cared about this domain for years, I wouldn't call it "premium".
Registration at
Namecheap cost $3.88 for the first year, and $25.88/yr after that. This domain was registered for 5 years, which costs slightly more than 0.01
BTC. That too makes it unlikely Themaster555 is the owner.