The registration of multiple domain names has many advantages. When you establish your company, you should always look ahead and consider future opportunities for expansion. If you intend to enlarge your range of products, which currently includes a particular product (like pre-packed sandwiches, with the domain sandwich-in-a-box.be), with other products in the same category (pre-packed bread, pre-packed croissants, etc.), you should pre-emptively register these other domain names. Otherwise, competitors who notice how successful your business becomes could get hold of them before you do! You should also think about registering variations of your domain name; in addition to the .be domain name, you should e.g. also register the .com and .net variations. This way, you will be one step ahead of cybersquatters who may register the domain in your name and ask for a lot of money when they resell it to you. You should also not forget about typosquatters, i.e. people who register a domain with a slightly different spelling than yours (gogle instead of googl, for instance), thus attracting visitors to their website, when all they wanted was to visit your website, but they misspelled your domain name.