There is currently a thread on the front page here about Topbet, and I don't want my post to be missed.
I deposited with these guys in fall of 2016, and ran my balance up to $20k. Withdrawing with them was a hassle, but they did send the first $11k or so. But everything after March 2017, they just never sent. Currently they owe me about $8,500, and they just give every excuse in the book to avoid sending me one cent of my money. The reality is, if they really wanted to pay me, it would be trivial for them to send me bitcoin.
Here is just some of my correspondence with them over the past 9 months. Fun stuff!
https://imgur.com/a/czpCY