The .com extension achieves higher trustworthiness scores than any other. The very first .com domain was registered over 34 years ago. The longer something sticks around, the longer it will stick around in the future. The most valuable domains in the world are without exception dot-com domains. In the words of Paul Graham, co-founder of startup accelerator Y Combinator: "The problem with not having the .com of your name is that it signals weakness. Unless you’re so big that your reputation precedes you, a marginal domain suggests you’re a marginal company."