I have never invested in cloud storage ICO ideas but i have researched a lot about SIA to get some idea and i should say , the SIA coin idea has already failed. This idea only works if sia just works with real storage investors, who will sign a contract to provide really great service. With personal computers, this project will never work. Imagine if you are a company owner and customer of SIA to get cloud service and someone who is keeping your files in China or somewhere-else turns off the computer and goes on vacation for 2 weeks. You have to wait until they turn on your computer.Sia will always lose its customers. This idea will definitely never work with personal computers. What I recommend the sia team to just work with storage provider companies who will guarantee to keep their storage available 24 hours a day 365 days a year. They have to stop working with personal computers.
Currently just about 2% of sia miners can find customers to use their storage. This is another issue and many other cloud storage ideas are coming up and I believe they will all fail. Imagine, only 2% can do mining and many other storage ICOs will share the 2 %

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The cloud storage ICOs will not be a good investment in the short term, just stay away at least one more year.