Short answer is….no! Especially if you are managing them yourself because you actually want some time available to run your business.
The key to knowing which social media channels to be on is to know your target audience and know what each channel’s audience or purpose is and then match those up.
Here are some quick tips on the social media channels to help
Facebook – great for consumers (not so much B2B), active users tend to be between 25 and 60
Twitter – much more popular in London, than other areas of the UK, good consumer portal, but some B2B use too
Instagram – very image focused, so good if your business is visual, users tend to be younger between 14 and 25
Pinterest – again image focused, so good for visual business, more women than men,
LinkedIn – great for business, users are a range of ages and male and female
YouTube – yes it is a social network, only works if you have video content, users tend to be between 14 and 50
Google+ – this is pretty much dead, forget about it