First of all, please note, that a dedicated server is rather expensive service, and you shouldn’t waste your money if you don’t plan to use it in full measure.
But if you really have a serious website, and want to run a successful business - you cannot do it without a dedicated server.
Of course it’s just mere words, so let’s enumerate the facts!
Freedom and security
Dedicated server will give you a freedom. You will not need to share it with other websites. It will also give you additional 3rd party security for your site and emails. A dedicated server will allow you deep access to your server to configure and optimize your server anyway you need.You’re able to choose the software to install.
Power and functionality
With a dedicated server you get on average 50-100 Gb of hard drive, plus about 1,000 Gb of data transfer. You may customize the configuration and choose any CPU, RAM, or whatever you need. A dedicated server reduces your dependency on the web host; and bypasses time delays and possible expenses incurred from these.
You simply CAN NOT run a popular website on a shared hosting. It’s not serious.
If your website turned into a popular and reliable resource; if you have tons of daily visitors; if you work B2B; if you need additional security and functionality, power and freedom - go ahead and buy a dedicated server. Don’t be sorry about the money you spent! Think about the future!