After the vaccine releases, there are a lot of people that don't mind anymore with the virus because they think they are already safe but it is just lessen the risk only to get a covid and also the investors and businessmen see the potential of having an online gambling casino even though they didn't open through physical casino still they can make an earning with the adaptation of the cryptocurrency at the same time. By that the both sides satisfied the casino runs and get their earnings and the players satisfied themselves to play gambling.
I think it's not only about the vaccine part but many people starts to realize that this all was only a drama. The situation nowadays are not tight as before. Many establishments have now opened up and the public are now free to use them again but only for some conditions like they still need to wear a face mask and maybe do some social distancing, just to be safe in case there are some customer who are positive.
I think that some of the owners of crypto casinos don't also start with the physical one's but fortunately they be able to manage it well though it will become more easier if they already have an experience before.