Whether a registration of a new TLD is worthwhile for you, depends strongly on the goals, which you pursue thereby. It can make sense for companies that are mainly active in a region. The user can connect a top level domain with a thematic or geographical search. For your external presentation the reference to your TLD is an easily recognizable branding. This creates a unique selling proposition for you. Furthermore, when choosing your domain, you should make sure that the user knows and uses the term. An addition such as .hotel makes sense for a large hotel chain or a booking platform for hotel rooms, whereas the user will not be able to use .holiday for this topic. You can reserve a new top level domain at almost every hosting company. They check the availability of your desired address and do the registration for you. In return, you will incur monthly costs.