Gambling can be profitable in the long run, provided we are not greedy or seek greater benefits than we have get. Profit 1%/day are better than 100% but only once.
How let's say you deposit 1 btc to gamble and don't win anything so you can't call the person greedy in this case.
Basic rule of gambling and it applies to anyone who gambles 'Deposit only the amount you can afford to lose' if you follow this rule you will either not gamble or if you lose you may not have any regret (hopefully)
Remember that gambling can't give us $50 to $100 per day, even you use 10 BTC. I am not just saying that i have been seen and also it is my experience of gambling. May be i am wrong but my whole experience of gambling lose is must we get and if we win than it is not guarantee we always win in everyday, than our skills and strategy also not worked.
I guess all depending on the individual, it is possible to earn $ 50 to $ 100 per day if you have 10btc as a capital. I'm pretty sure many gambler can do that,of course must carefully using the capital.