===> I guess the answer is NO. Because the IDs are dispeared after few months of playing.....I think they will continue playing here if they won!!
There is no logic to this. A big whale can stop playing in a casino for many reasons: maybe he has tried another casino and likes it better, for example. If you have been betting for some time and know a little about the subject, you will know that winning in a casino is not a guarantee of continuing to win, on the contrary, by pure mathematics, the more you bet, the more likely it is that you will lose because of the House Edge.
Who knows what happened to them but I think wagering that much they would sure at least have won the daily and monthly jackpots which although is much lower in value than 60 Bitcoins it is still something that these gamblers could have continued to play here.Also I don't remember seeing any of those ID-s winning the Lambo which again is much lower than 60 Bitcoins but 60 Bitcoins wagered means like 6 Bitcoin gambled as a minimum which would make sense for these gamblers to continue if they had won something.I believe disappointment made them go away probably.