Ask HN: What would happened if an operator of a gTLD went out of business?

With all these new gTLDs everywhere, I am wondering what would happened if I bought a domain and the operator of the gTLD behind it went out of business. Will the entire gTLD and all the second-level domains registered under it disappear? If this is what is going to happened, then I guess these new gTLDs are not reliable for any serious project. I am interested in reading your opinion about this.