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Financial product or services will receive a significant impact from well-developed AI and machine-learning-based pattern-recognition systems, especially now that Intel has joined the artificial intelligence race with their Ponte Vecchio exascale GPU.

Yes, .COM namespace is saturated to the point that it is very hard to register a viable domain name, especially for fresh companies and startups.
Big, established companies can afford to buy the perfect .COM domain for a domain marketplace or domain broker.
On the other hand .IO is a kind of acronym for Input/Output and I would add that it is a good choice for communications or knowledge exchange websites too as well as the ones you mentioned.