I advise you all to shop around for other sportsbooks/casinos that offer you bonuses because they make huge differences to your profits and betting strategies.
I have not played in many crypto casinos but from what I have seen online through promotions most of these online crypto casino offer some kind of bonuses to attract new customers and there are also bonuses for high rollers so keep them. Bonuses should not be the only thing that should attract you to a casino you should consider other factors through reading their terms and Conditions document for appropriate guidance. Any casino can offer bonuses but do not believe all bonus promotions there maybe hidden fees attached.